oh ok cool 5.5mm it is. I'm gonna use deans connectors for the batteries to the esc cause all my packs have deans on them already.

i was going to get the strobe slipper but funds wont allow it at the moment :( That will be my next and hopefully last hopup(Yeah right! lol)

So i get the "5mm bore 32 pitch pinion gears"? might try an 18 tooth, is that ok with the 64tooth spur? How do you work out the gear ratio and how fast it will go? I also have the supermaxx 8 spider diffs, does that effect the speed?