Received the ulton insert and all the pins from 2 x 0.7mm to 2 x 1.7mm.The insert fit on both versions of the Cabeo this one here and the ulton version.The ulton version of the cabeo definitely has secondly air coming in from somewhere my guess is the top cap.The insert works alot better on the fasttech version,i had to play about with pins as 2 x 0.7mm and 2 x 0.8mm the air made a howling noise.I settled on using the 1 mm pins but with one side of the top cap only.I would say improves the draw slightly for this version but for the ulton version i would avoid