One more question Question 3: The excavator for the shop pad and road approach sloped the drive into the wall. There are other problems that get created sloping the road away from the wall. It rains a lot here. My thought is to install the usual drain line with drains every 40' passing through the wall and then throw in an extra 4" perf pipe the whole length for "back-up" drainage with maybe just one or two wall exits. I'm planning 16" of washed drainage rock behind the wall wrapped in geotex. Stupid is as stupid does? Your thoughts are most welcome.