I beg to differ on the whole "undriveable bit"

Not undriveable but not pleasent would be a better explantion

i used mine on the road briefly with a welded diff......... round corners you have the sensation that its trying to understeer and in fact it is.... UNTILL you stick your foot down and you get buckets of OVERSTEER

dont get me wrong loads of fun BUT the damage it causes to other things and noises it makes

tyre wear major issue ... either scrubs tyres to pieces or you simply burn them up as you have more fun sideways.
when turning corners slowly there are bangs, crunch's and even HOPS

so parking in tesco's isn't easy anymore......
diff mounting takes a hammering as there is no give and trys to twist it up totally.......
So in my opinion a welded diff - YES loads of fun , more grip in straight line initially, and if drifting/sideways is your thing .. so controllable

on a road car NOT A GOOD IDEA!!!!!!!!! imagine a corner of the M25 @ 70mph.... the car would be trying to go sideways then.....and that would prob end in tears

buy a 2nd hand diff weld that up and just swap them if you want a bit of fun ........ if not source an LSD diff.. not as good but still loads of fun
