FatBoy,
Suspension does not Stiffen up with use, it loosens up with use. If you are soft now after a couple of rides it is going to get a considerable amount softer (if the suspension job got all new bushings, seals, wipers etc.). Pesonally have never dealt with ACME, but I know alot of guys out West has used them reportedly with good results. Sounds as you are needing to go stiffer (your a Big boy / Me Too!), do you know what spring rate you are currently running?