I have been getting mine to work as a foam car indoors, I wont lie its been a little bit of a struggle and I got close to thinking about either getting a 3.5mm chassis made from Fibrelyte or just selling it. I cant believe how soft the car is!
However I dont give up easily, and its really starting to get there now, this week the car was amazing and it was only my thumbs that were letting me down from winning every heat.
I have a few more tweaks, and then I should be able to post a foam indoor set-up.