Odd night last night with my 10.5 TP, I tried upping to 30 on timing, gave it some punch, but traction was low so many ended up with too much wheel spin, can't quite figure if it gave me any more top end, I upped a tooth on the pinion and it got a touch hot (77C I think), so backed off timing down to 25 again, not real sure if I should try for more timing and less gear or less timing and more gear, so far I still feel it's not coming up to what I was expecting from it.