I assume you are talking trap door hump. I have heard nothing negative other than a couple guys that got a warped one from parts. Mine have allways been good. I heard plenty of good reports but haven't went out of my way to get in all machines. I will ussually set door a bit tighter than stock to account for extra weight of hump and to compensate for some pressure of cylinder sucking straw from it. I'd go for it. I believe hump will be standard someday. Good luck