Quote Originally Posted by mekanik View Post
Woodspiral
I am a noobe so know nowt but did find this an interesting read and it's about the size you are looking for
Machine frame - MadVac CNC
The epoxy method he uses is pretty much the same way I do it but I use Mixture of epoxy putty's and Epoxy resin's and don't really bother with the fillers has I've found they are not needed unless having a thick layer.
For bolted frames then the process is timely and the Dowel pins take some time and effort, but if welded steel frame and you use an adjustable top rail then it's quite easy really. Just careful setup and epoxy putty. Beauty of epoxy putty is you have plenty of time to do this and it's not messy, can also be sanded, shaped, drilled & tapped just like metal when dry so it's good for filling gaps and holes. If in use you find you just quite didn't get the rails 100% on same plane or parallel then it's very easy to shim into plane with fine shims. (Tin foil works a treat)

Damning the top rails with a bridge and flooding with epoxy also works well but takes more time and effort can also be messy, so it's important to have good seals other wise leaks will happen and then shrinkage in places. It's also not so easy to fine tune if you haven't quite it the mark.!!