I see some of the aftermarket starters now say they are 4 brush in the eBay ads. I have not confirmed that for myself. I have always rebuilt the OEM starter including replacing the commutator with new brass.
I have one comming in the mail, got it on E-bay...supposetly brand new with 4 brush. Got it for 111.00$. I guess i will learn in a very near futur if that was a good buy or not.
But living in Canada i dont expect to use my FL350 during winter times and during summer i have a hole bunch of other stuff going on, so with the kind of use that i will do with it, i think that i should hold for a while.