I've done a lot of reading on your site, and fairly sure I have it figured out, but just want to be sure before spending the money. On the MST and CSP, I shoot 2 and 3/4 shells most of the time, so would the competition version of those handle pretty much any 2 3/4 round without issue, including buckshot and slugs? Just wondering if I only need the multi use version for 3" heavy / mag loads, or is it necessary for any heavy load in any size shell period? So far my gun runs the 2 3/4 lower velocity (1050-1100fps) stuff fine even with the 18.5 barrel, but a little insurance never hurts, and it'll keep things cleaner which is always a good thing. Going to pick up a CFR also, and having trouble deciding on which one. Just not sure I want to tackle the work needed to really make use of the double / quad ready version. Is there any downside to ordering the double / quad ready version and only sanding the forearm down without milling the receiver? Or is it pointless and just order the field fit version?