nifty frame.  I bought some quick release pins so that the back and the seat can be separated easily and moved up or down stairs.

Notice how the legs are two parts of wood stuck together.  On my frame, the shorter part of the leg does not come up to meet the cross members.  There is more than an 1/8th inch of wiggle room.  I plan on adding some shims to sort this out.  All other holes/screws etc. line up just fine.