Thanks for the advice, guys! Think I have these things covered. Have lots of spares of the little parts and I just got my 3/4" no-mar mallet from Brownells, brass head on one side for roll pin punches and plastic on the other for metal contact. Should that be good to go? The only concern I have is marking the receiver when doing the bolt catch roll pin, as I have had that happen in the past doing a repair. Just a tiny little mark on a carbine that gets used so I wasn't too worried about it, but I don't want that on the lower I build for my Stag LTD upper.
I've seen the suggestion to use some masking tape on the receiver, but I wonder how effective that will be. Is there some super-duper industrial masking tape that I should look for?
ETA: Just got my UPS notification! The lowers should be in on Tuesday!