Here's how my stand is going...
First day's progress:
While test fitting the gussets (as I cut them) I discovered I had placed one of the 12.5" pieces 2" too close to the end (one at the bottom of the picture). DOH!! So, I cut it out, ground the weld off, cut a new section and welded that in position. Also after the first day, I welded the wheels in place. These are rated at somewhere in the 250-350# range [each]. So more than enough support. Plus, they have real ball bearings, grease fittings, and you can SEE the bearings and grease in there.
Gussets tacked into position:
Test fitting my Blichmann burners:
Need to move one of the gussets in the middle position to get the second burner in place. I'll remove it, then clamp the burner in position while getting the gusset in place. I'll then check the third position to make sure a burner will fit there. I'm using 1-1/2" angle iron for the gussets (1/8" thick). Since they only need to hold the burners in position, I didn't see any reason to not use that. Plus, it will be easier to bolt the burners into position with angle iron than trying to do it with square tubing.
Next up is putting the [two] pumps in position, as well as making the mount for the plate chiller. Still haven't decided where I'll put the switches for the pumps.
I figure my investment, so far, in the stand is maybe $125-$150 (not counting time).