First off I want to correct a statement that I made in an earlier post where I stated "Even those on the forum with the most Meriden experience are unsure what the guts should look like.". In looking back I don't think is a entirely true statement. What I meant was that there isn't a lot of experience with a 20ga gun but experience with a 12ga variant sure helps provide insight into what I will be up against.
kutter, thanks for the info on the FP tip. As to the FPs for the 12ga guns, any thought on why they are in two pieces? I don't see a lot of benefit to this but hey, what do I know? Also thanks for the info on the LC Smith sidelocks. Will have to get on their forum to see if I can glean some info from them.
damascus, thanks for the idea on using alginate. I had thought of that at one point but wasn't sure how well it would remove from the hole. My experience (at the dentist) lead me to believe that it didn't set up hard but remained soft. Maybe there are different types. Like the idea of the needle. Also the part about cleaning the hole really well with an abrasive makes sense. I need to take another look at the hole but if memory serves me, it's fairly rough inside. However, as my wife frequently tells me, my memory sucks.
Kirk