Beautiful! What binding is that?
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Freebord
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Looks great! Maybe tilt the motor mount a little more upwards. It’s super low.
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It looks lower than it is but you’re right i could push it little bit upwards. But they have to be pretty low other wise the motor mounts hit the deck when i make sharp turns.
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I’m more interested in the telemetry setup you have going on here 
What device do you have logging? Does it connect to vesc for the speed data? What sensor is it using to detect when you finish a lap? The overlay is really cool! (Sorry if this is off-topic)
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GoPro 5 and newer have extremely good GPS modules that are both very accurate and log with a high frequency (about 30 Hz on my GoPro 6). The GPS log is embedded in the .mp4 file. You take it, import it into the RaceChrono Pro app and it makes this nice overlay for you… apart from a lot of other useful stuff. You can analyze your laps in detail; even compare with other riders on the same track if they use RaceChrono as well.
Here’s my best qualifying lap compared with David’s best qualifying lap:
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oh wow 30 Hz is like two orders of magnitude faster than I was expecting that’s so cool. Did you pick this trick up somewhere else, like is it a common track day tool?
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I’m experimenting with a 3D printed concave. I don’t really miss the concave when riding casually but when racing I feel like more support would help.
This is what I came up with:
The part is too big to be printed on my Prusa printer so I split it in the middle and printed as two parts.
For starters, I just used black PLA and printed without supports. The bottom is made to copy the shape of the deck so it’s not completely flat. It doesn’t print great without supports but it does work.
I heated up the finished print with a heat gun to soften it and then I pressed it against the deck. That made it copy the deck shape almost perfectly.
Here’s how it looks on the deck:
I’m going to put some grip tape on it. Then it should look a lot better.
I’m not sure if I’m going to use the holes for the bolts. So far I just taped it to the deck with a double-sided tape and that seem to be good enough (and I didn’t even put a lot of tape).
I haven’t ridden the board yet (it’s rainy) but just by standing on the board I can feel there’s a lot of difference. I’m sure this will be a significant improvement when going around corners.
Here’s the STL file. Mirror it in your slicing software to get the second part.
gp_concave_1.stl (103.1 KB)
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That track, the conditions and the detail in that telemetry is like esk8 Shangri la. I was squealing like a child watching that video… wishing you had a more torque-y setup 
There’s something a bit perverse about adding concave to the FBNEF deck, dude, but I sympathise completely. Have you considered making a NFAA deck?
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Haha, thanks. I don’t think the board needs more torque. It just needs a better rider. 
I’m still considering it. I’m actually already working on something…
The problem is that I have gazillion versions of it and I can’t decide for one. There are so many variables. If only there was an easy way to have a deck made, test it and iterate.
I still think there’s value in a mostly flat deck. It makes things so much easier when building into the deck and you can always add whatever concave you like.
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For the concave variable on the deck design you could cut the model up and 3D print the concave wing part. Then test the feel with your own feet. If you have three different versions, it might already give you a good indication for which concave feels best.
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Right. That’s pretty much what I’m already doing.
This one is raised too much in the middle. Not comfortable.
This one feels nice. However, there’s a little valley near the drop-down. On one hand it’s nice since your toes fit right in and you get locked in nicely. On the other hand, you’re missing leverage on toe side turns.
Still, there are so many more variables. The deck length, width, drop down size and transition angle, split angles or not – and if yes, how much… So many questions.
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Hahaha thats awesome. Maybe make a design requirements sheet, makes it easier to focus the design.
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I finished the concave. Here are the printed parts. I needed a cutout for the front part because of the freeboard binding.
Gripped.
I’m not too proud on how I trimmed the grip on this one but it’s not terrible either.
A little bit of double sided tape. This is my plan A. Should it not hold on well enough my plan B is to use the mounting holes (which I’m sure my deck won’t appreciate).
Aaaand… the glamour pictures:
I went for a quick test ride and I like it a lot. Will report back after doing more riding but I feel very positive about this change. If weather allows, I’ll take it for a T-race this and see if I can improve upon my world record. That’s right, I’m currently the T-race world record holder. 
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looks awesome!
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Quick update after my usual 10 km commute from the office. The printed concave makes the deck so much better. I definitely recommend that you guys try it out. @glyphiks @philo @michondr
Edit: The STL file is above. Let me know if you need any adjustments to it. I’m also happy to print it for you if you don’t have access to a 3D printer.
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