2wd
4wd is more expensive to maintain, 2wd sworkz also do a tidy car (just built mine) that can fit saddles or singles and loads of room if using singles for moving forwards or backwards for weight distribution and the difference on speed is minimal as the mid motored 2wd designs have got so much better so much so that you could be on the same pace as a 4wd easily.
As per Cutting42 comments, I would get rid of the durango as i found it frustrating that one setup wasnt good at the next event and wasnt a consistant car whereas sworkz, yokomo, associated schumacher do very good consistant cars that dont need much maintanence or set up changes once youve found a good setup.
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