I have been racing offroad at a club with about 30 regulars lately that is 1.l5 hours away from me but worth the drive.
Weekend just gone I raced my new B4 with one set of wheels/tyres with Green Minispikes on them. I used an old touring 12 turn motor and used the cheapy enduro brushes I get from BRM. I used 3 stick packs that were peanuts (Vapex) - they cost I think £12 or £13 each something like that - 3700s.
I qualified 5th out of 22 drivers and they don't seperate 2wd or 2wd there
Great fun, dirt cheap - maintenance when I got back involved 1 cup of tea and a paintbrush