I have a full size sig tac ops and I have had zero issues with it. Eats everything and is extremely accurate. I've changed the trigger springs, hammer springs, and put in a stiffer slide spring. I had no problems with it before the changes but I do like it even better now. 
Perfect timing for your post DRobnsn as I've been seriously looking at the TACOPS TB for the last couple weeks. My wife told me the other day she was sick of me talking about it and to just buy the damn thing and shut up already but I tend to research things to death before I buy.
So you like your Sig TACOPS pretty well I take it?? What did the spring changes do to improve it??
I looked at the shorter versions, carry and ultra carry, but I have no intention of using this for CCW so I think the full size will be more to my liking. And, the 460 Rowland kit looks like it would be a serious amount of fire power from a 1911.