Hi, I've got some tsr-8 rack ears.. I'll send some measurements if you want, but you can measure the machine itself, that plastic piece that has 3 screws that go on both sides of the machine has the same measurements as the rack ears, as the rack ears screw into the same holes and are the same height (exact height of the machine) and once you get the machine side holes drilled into your homemade ears, attach them to machine, put cart/stand level so you lay machine on to and its laying flat with reels facing the ceiling, then get underneath and mark holes for stand/cart side of the ears, but if you want measurements I can send them.. oh and not sure if there still up but last week someone had some on ebay for 75 bucks