28) Top piece is unmodified, bottom is sanded. Note that the tabs
have been broken off of the right side and part has been trimmed from the
left (using a dremel cutter wheel) to make room for the barrel.
29) The goal is to make the inner hole just big enough for the barrel
30) Once completed, re-assemble and adjust the 10 inch piece back and forth
until it is properly aligned to be parallel with the 4 inch barrel when
in place, mark the position, then disassemble and hot-melt glue into place.
