Thanks for the info Bob.
I wanted to do it separately so the column could be removed later. The machine will have to be torn down to be moved sooner or later.
The JB is in the mild steel range for strength and hardness which is fine. Plus it does not shrink. It's just being used to create a surface, there is no movement or anything. I wouldn't think of using it on a moving surface or the like.
http://jbweld.net/products/jbweld.php
I'm having problems with the electronics again... Missing steps on the X and I had a freeze where it seemed to be stuck between steps. It's a really simple program, a domino top surface and profile. It machined the first one OK except for a couple missed steps on the X (a ridge on one layer of the roughing pass), second started missing more steps and the third out and out froze. I also could jog in .001" increments on the X but not .0001". This is getting really frustrating. I'll shoot out another email (hopefully he responds this time...), call if there is no response and try some things like Sherline mode to see if that fixes it. This is Gecko 250 based and I heard about that problem (needed Sherline mode) with some of them.
If that doesn't work and things aren't resolved via email or phone I'll start to look at another electronics package... Probotix, Keeling, etc...
Serge