Hey Mick, when our track is that way, it's hard to get grip. You just have to learn to drive it that way to be honest. It's not an 1/8th scale.
However, I've been told Holeshots and Bowties work well when the track is that way. I've bought a set and plan to try them. We'll compare tires some this weekend.
Otherwise, the other gentlemen is correct. If the diff feels bumpy, rebuild it. It has to be smooth. Rebuild it by the instructions exactly!
Come on now if you know me I have ran 2wd SCT since my first race and it's very similar when it comes to throttle control also have won a trophy in every big race I entered this year with it so I realize that but I expected a little more grip from the buggy than there is thats all. I have never messed with the 12mm springs so thats really what I would like to know about should I use same rates as I use with 10mm AE springs or go softer/stiffer with the Losi 12mm BB springs? I have Bowtie m4 rears on the way now and I have the new 2wd front Holeshots on the buggy now and steering is great and maybe it's just not heavy enough to plant those Caliber top pins in the clay. Diff came pretty smooth but felt like 2000wt gear diff so I tightened it just a little so I probably should have left it alone but I have watched that video a couple times and waiting on rebuild stuff to do my own build. Thanks!