I ran mine yesterday and by the final i was mega happy with it.
I changed to running 25' Kick up with 5' Caster block and it felt lovely. Also, ran no weight on the rear and it was super smooth. I tried one race with 50g at the rear and it was all over that place, so edgy and bouncy.
Ran No anti-squat and long wheel base.
3.5' HRC Block
Just weighed it.. 1548g ready to go. So by most peoples reckoning, very light, but it was so nice.
Still some things i want to try, but for now, that's a lovely setup for bumpy, grippy conditions.