I don't think thats the issue - I fed the sleeve in the bore on its own and it slid in easy as you'd want and would move, but only further in as you couldnt grab it to pull it out. When I finally got a bite on it it pulled out no problem. I think the interference was just enough to not drop out of the bore by it's own weight or gravity. I think the issue is feeding the whole valve assembly back in - something is hanging up somewhere, and the sleeve (at the bottom of the stack) will only feed in half way before it "bottoms out" Maybe because we lengthened the spring by 1/2 inch, maybe because the spring is cocking, maybe because the valve has to find a smaller diameter hole at the top of the bore to seat in. But I was seating the valve and washers with vasoline before I fed the spring and sleeve in, so my money is on the spring cocking in the bore gap. it'll help to be able to mock it up out of the car to see what's really happening, but I dont think Nekkid Hillbilly is going to ship the parts until after the holidays. So I sit and wait.