Thank you for your comments.
Yes, ADW released two vehicles from Steyr RSO series, the one with Pak.40 and the one with square cabin that I'm working on right now. However, I think my models have more moving parts, engine, gearbox, driveshaft, fuel tank, all the inner walls in the lower body, working suspension, and maybe more detail. Also they based the Pak.40 version on a restored version with original parts already missing, while mine is based on photos from World War II period. I haven't seen the ADW models built, only in photos on their site, so I could be wrong. Nothing to take away from them, maybe it's just different goals, that's it.
Here is the finished design of RSO 01 with square cabin, production of which started in 1944. I design my models in 3ds max.
![Obrazek](http://img.photobucket.com/albums/v345/Daimyo/RSO-01/bed20921.jpg)