Due to too much time under lockdown, I’ve added a lot of setting (probably too many) to adapt to various riding conditions : there are 3 wheel axle positions for wheel diameter from 9" to 7" .(it also change board maniability)
In addition, the deck position is adjustable in height, roll and pitch so it can accomodate plenty pneumies.
I will try to make pictures of the different configurations with more explanation.
More detail about the 3 wheel axle positions, for 7", 8" and 9" wheels, around the motor axle.
In addition, changing the arm length modify the maniability, like changing the pivot angle on a truck
Does that not throw off the gear mesh?
Wheel axles are on a circle around motor axle so it doesn’t change gear relative position (theoritically)
Here is a picture showing the deck height adjustment possiblity (I exagerated a bit the high and low position to make it more visible).
This is spectacular!
When do you plan on bringing this to market first?
(Sorry if I am jumping the gun, but I could see myself buying one 
)
Thanks, really.
I plan to have the first boards available this spring (without unexpected lockdown), at small quantity, for “educated clients” (able to monitor and repair the board if needed)
Would it be possible to add some additional holes or make a second main arm linkage part that would allow you to attach a boardnamics gear drive?
Yes, the motor axle vs wheel axle position can be easily modified…
I’m doing a test with internal gear for the fun but will probalbly use more standard gear drive
F*****g around about RTC, max lean angle and deck height with pieces of “rubber”, hand-made parts (noone has the same dimension) and few nervous breakdowns…
That motor looks dangerously close to the ground…
I love how far you have come with this dude! Its looking awesome 
Thanks for your kind words…
You are right about the motor position, that’s a weak point with internal gear transmission as it lowers the motor…However, the leaning angle is a bit excessive to make a nice picture…in real life, 30 degres is enough for a confortable ride (I’m working on the rtc to “control/limit” it).
The motor on the picture is a 67mm and I would prefer to use 55mm motors with internal gear to keep the weight low and a stealthy look (also I don’t know how much power this cheap gear can handle).
In addition, I will probably switch to external gear transmission as there are much more models available (helical, gears ratio,…)
Mishap…
When I wanted to turn on the electric package after few months, it didn’t worked so I tried (without thinking twice) to control the battery voltage directly on the esc battery cable connections (bad idea) but I screwed up, made a short circuit and melted the esc…Well, at least, the battery is still good!
At least, I managed to make running the rest of the electric package and (hopefully) will be able to test the board with a single motor.
Bad things happen and yes with electronics it is best to double, if not triple check all connections and actions u are planning to take…
Also had a few mishaps with week interval
Yes, definitely…
Initially, I was planning to test my frame with sails/wings, as usual, but due to lockdown here, I had to change my plan and went a bit too fast without thinking enough…
I will try to remember the lesson.
Due to lockdown here, I 'm working on improving the electric compartment, at least regarding vibrations and (hopefully) cooling…
Considering my prior mistakes (see above), I won’t try to modify/shorten the electric wiring now (same for sealing as it’s dry season here now).
Detailed view of the carter of the internal gear. At least, it should be gravel proof.
3rd version of the electric compartment, with more space and fastening.
I’m trying now to improve the sealing.
What’s your battery specs?
