Another vexing problem solved: tighten the flare-nut fittings. After purchasing a 13/16" crow's foot, 12-point, flare-nut wrench of 3/8" sockets, we find there is not enough room inside the casting to swing it around and tighten the nut. Bill bought for me an inexpensive 12-point combination wrench that we were going to heat and bend around so the wrench would work. Using the crows foot wrench as a guide, we mark the opening size on the box, which will turn it into a flare nut or tubing wrench (you slide the wrench over the tube to get to the nut), I use a fine 6" cut off wheel in my hand grinder and cut the opening in the wrench. Hey!, we don't have to heat and bend the handle! The wrench, when used from the top, can reach the nuts and we tighten them home.