I've had them in my Valk for a while now.....just put a new front on the GW yesterday and added the beads to it and the rear also.
Like you Jay I believe they work as advertised.
I put 2 full ounces in both.....it won't hurt having a bit over, but you can have too little.
(4 ounces in the Darkside tire on the Valk)
good luck with them, Ken
Only need 3 oz for car tire and you need 3 oz for the 200 battleax.
David