The yellow 'clamp' hoops are made for Melco by Hooptech...you can order them direct from Melco and NOT pay extra for the 'conversion' bar or something. We almost ordered from Hooptech until they suddenly showed up in the new Melco catalog. Limited use-you cannot use them on hooded shirts, back of anything, etc. because there is no place for the 'excess' material (like the hood) to go...and if you have a problem with a sewout-like a birdsnest underneath or something-you cannot take the garment off and put it back on. But for polos, shirts, blankets,, even hat backs-and especially TOTE bags and christmas stockings, wow! Get them from Melco, and the last upgrade I got for the Amaya OS has all the hoop info built in. The system is expensive, so is almost any gadget for the Amaya...but it does work. Hooptech has two 'sizes' of master frame assembly, and then different sizes of the clamps in each. Same idea as the fast frame system, but now you get a 'clamp' to hold stuff down. Always, ALWAYS, ALWAYS do a trace first with this system-to make sure you have the right hoop selected, and to make sure your garment won't pull or shift before you start! Roland