I am also running a K1 in front wheel drive mode. THe only changes I have made are to relocate the esc to the top deck, which means I can use a shorty lipo up front ( it sticks out beyond the chassis but is covered by the shell). I can also use saddles inline on the RHS, or across the rear when I use it as 4wd. The front wheels are 4wd fronts to keep within the allowed width limits. The BRCA rules specify a control tyre in some competitions, but they only quote brand type eg Schumacher mini-spikes. No mention is made of tyre width so 4wd fronts are legal. There are some inconsistancies though, as the 2013 National entry form quoted a control tyre for the rear wheels only, the front tyre choice was free!
I find it easier to drive than rwd, so I shall continue to use it as fwd.
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