1. I use a stanley knife

2. ABs is better than PVC, yoko single rings are best but expensive, Tamiya's are too grippy, ABS is best value for sliding with a bit of grip.

3. Something like a 58/22 is good for Sport tuned.

4. Yes, you need to drill holes for a licence plate to mount the muffler, wipers are ok, mirrors depend on the shape of shell you put them on, will prob be ok.

5. I would say no, its far too much cash to clip a kerb and wreck, jus get some Speedway 37r's or something and keep the change, a lot of it!