Haven't had one melt yet. I've seen them split where they attach to the cylinder because it is sharp around the edges, but some Emery cloth eases that a bit. I should just send you mine and let you play with it for a week and see how "bad" it just "falls apart" in your hands. I've been running mine for about a year now with no trouble except for the decomp valve.... I take that back, the starter recoil was **** out of the box, but I put a different one on it the day I built it. So since then no issues.