I am happy help with testing! I think I am decent at breaking stuff 
Regarding the F5s, I broke all these within the last 2 months. I had broken another ladder strap roughly an year and a half ago but I couldn’t find it now so I probably threw that one out. That was also the inner strap and broke in the same place ±3mm.
I’m located in the EU - I spend about 80% of the time in Denmark and 20% in Hungary.
For now I have the RaceBro ready to take parts for testing. And I also have racing experience, I do T-race, sometimes alone, sometimes with friends, and I try to go to as many EU race events as I can make it to. With the new board I am getting close to the very best in the EU.
At the moment it has for track tires on it, but I can put my 9x3.5 turf tyres back on the widened rockstar xls and it’s gonna be an offroad beast. I can swap the 4 tires in 5 minutes once my second set of rockstar xls arrive in a few days. The picture is of my previous board with the turf tires on it
The racebro is quite a heavy board by mountainboard standards, around 23kg ±1. Still jumpable though but a little heavy for crazy jumps
I am also planning to build a jumping and mountainbike track specific board which is much lighter but tries to keep the insane torque of the racebro. I’m completely open to using any parts on that board 