ggrrrrrrrrrr[:@] when i took my supertiger 75g apart a few months ago that would have to be the worst experience ever and makes me mad to this day just thinking about it.....yeh the dang ring not going into the sleev[:@].....this help enuf to get my engine bak together....put the piston in the freezer for 10 minets and the sleev in the grill for the same time...this makes it a bit easier to get the piston bak into the sleev......oh gee it mad me mad trying to get that engine bak together it took so long[:@]