Hey... did anyone notice Mefferts is now selling a (sort of) DIY megaminx? I think it's the same puzzle, only this one comes with the center caps removed, and the tiles aren't already glued to the puzzle. They're calling it a megaminx for speedcubing, and for an extra $2.00 you can glue all 132 tiles on by yourself. Or, you can make life easy on yourself and buy cubesmith stickers. Here's the link...
http://sites.webec.com.hk/meffert/index.cfm?fuseaction=detail&id=339431&product=237
To tell you the truth, I think it might be worth the extra two bucks, given all the extra work you guys have had to put into your Mefferts Megaminxes. At least this one is ready to disassemble so you don't have to work so hard to replace the springs.
By the way, I'm really happy with my Cube4You new megaminx. I don't have a Mefferts to compare it with, but it's nothing like the Chinese megaminx. It's smooth, turns well, and it's stable - doesn't feel like it's going to pop at all. The stickers that came with it were terrible, but once I lubed it and put on cubesmith stickers it became my favorite puzzle.
Here's a link to that one, too.
http://www.cube4you.com/279_Megaminx-with-PVC-sticker.html