tanks for all the replys,

basicly what I had in mind for upgrades are the following:
Metal tracks
Inproved idler system <- I already bought that one to chek out the service of afv-model.com
metal swing arms
better bushings for the swing arms
And I put a bearing in everything


I'll probably do some home improvement ont the chassis brace and return rollers.
And I've read that the battery pack on top is to heavy so I want to move it to the lower hull

More advice is always welcome and when it arrives I'll keep you posted with info and pics.

Happy holidays,

Pim