I think that gains get harder. I also think it becomes harder to be 100 % hard. I started with 7.25 BPEL x 5 EG and I am now 8.75 BPEL by 5.75 EG after 3 years. The only problem is that it has become a lot more "heavier" so it is harder for it to go straight outwards. I've been doing much more of kegels and that seems to be helping.

As far as gains go, I gained an inch in the first year and then it took another 2 years to gain half an inch. Girth also gained much faster at the beginning. I don't know if this is, because I'm pretty big or if its because after you gain a lot it becomes harder for EVERYONE.