I ordered a bag full of turned pins (c. 10 x 40 header rows) from Hong Kong for a few Green Queens, free p&p. Well worth having in the spares box. If the upgrade arrives with square header pins, I take them off and replace them with the turned ones. Anyone with the skill to transplant a machine socket from one board to another can remove a row of square pins. The fact is the machine sockets are effectively destroyed the first time you push the square pins into them, so although machine sockets may seem like a good idea at the time, the next time you want to put a regular IC or turned-pin adapter in there, the socket will need replacing anyway. I once removed an IntSDX board from an 800XL's OS ROM socket, and thereafter the OS ROM chip itself literally sprung out of the ruined socket at the merest touch.