Thanks Chakster! I received the nut and washer promptly, but did not get around to mounting it until this weekend, with help from my local dealer. Had to scrap off a bit from Swissonor’s arm board and the interior of the plinth, but was able to do so pretty cleanly and it does not show with the arm mounted. Got the exact pivot to spindle and arm height that we wanted. It sounds and looks great. Too bad the B60 base won’t fit. Actually, the washer didn’t fit either, but my dealer has some tools that could shave off part of the washer to make it fit. TD 124 has a low platter. Since this arm sits very low, I think it's a great match.