I haven't been able to find anything concrete so I thought I would ask the experts here. Since the SD frame is almost identical to the Sigma, can I use sd internals in my sigma and use the apex kit to get the best trigger without chopping/removing springs? I want a good set up that will hold up in court but I don't have the money right now to buy an SD. I could get the parts for the Sigma gradually. I like the gun very much, however I don't care for the trigger as it tends to pull me off target. Has gotten much better with shooting over time.