Hello Fellow Builders, and those who are considering it:
I have met with success, and would like to share it with you. First, NO ONE should be anxious about putting together a lower!
RRA stripped lower, $95 shipped from Robert at SableCo.
Parts kit, $65 shipped from Pete-in-New Hampshire (I paid a bit extra, and was happy to, because Pete had these in stock). Just arrived this afternoon.
HI printed the lower assembly instructions from the AR-15.com home page, and followed them as written. Tools included one punch, small hammer, small screwdriver, small nail, cotton cloth, and hex wrench for pistol grip.
30 minutes later, it was complete (sans stock and upper, which will arrive tomorrow from Steve at Adco. No marred lower, all functions perfectly (trigger is heavy, however!).
No kidding here...30 minutes for first lower build. DO NOT HESITATE IF YOU ARE CONCERNED THAT YOU CANNOT PUT THIS TOGETHER.