Quote Originally Posted by craigrobbo View Post
Yes, the bed extrusions.

If aggregate is too large, how about epoxy & sand?
Epoxy and sand is a valid combination. The advantage of course with using epoxy over just sand is you will add strength. It's going to need to be very thin to go through the extrusion, bubbles/voids could be a problem.

The other question is, is it worth spending lots of money on epoxy on such a cheap machine. I think you would be better off upgrading other parts of the machine. Sand on it's own is basically free so you might as well try it.