I've used stand up f brushes for Mod oval and they were pretty good. My issue is that I don;t have a convenient local source for much ther than 767's and putnams may be a future option. I do know that 767's good for one killer run (stock 12th) second run is pretty good, third run you are in trouble. The xxx's gave me 4 really good runs but to be value for $ they need to double that. I'll try a set of F's in my stock and see what happens but I have to factor cost in as I'm on a budget.
Thanks for all the info guys.
Eric, if you have anything to add please do.
Thanks