Yeah thinking back, I think 500 was a bit zealous, but hey, I was excited
Anyway I was in the LGS yesterday and was looking at a used .45. It has a arched magwell extender and a set of VZ grips with a thumb notch. I noticed that the comfort of the hold was much better compared to mine, it seemed fuller and more natural in my hand. I may try out a arched main spring housing before going with a magewell extender. The main spring housing is quite a bit less than the extender, so if I do not like it, I am not out as much.
Thanks for the links on the grips.