@Nathan: Thanks. At the moment I just aint got the time for scratch builing. It´s a pitty. Some weeks ago I got my 3d-Printer from Solidoodle NYC and haven´t even unpacked completely...
There where to probs with the SA Driving line. The first was that the difflock on the axle is triggered with a very fine lever and rope. I simply scrathed one of at the rear axle at this event hitting a rock. Anyhow Mr.Michalik from SA was kind enough to repair the damage in a very short amount of time with no charges.
The other problem is the differential (alongside? don´t know how to discribe "Längsdifferntial") in the main gearbox. It is meant to be very scale, but the effect is slightly strange. There are several threads on german boards about the construction and knowledge behind this part. I honestly don´t get all of it, but shortly said: It was meant to divide the forces rear/front while all axles are locked, but under certain circumstances the wheels start turning different ways. Here´s a vid from a german colleague:
http://www.youtube.com/watch?feature...&v=9_lENkezZ8k
bye
Ulrich