Hi Kalun:
Thanks for your input.
You are correct that a surface plate is a much better way of manufacturing a tubular chassis. The cost of a surface plate is not in my budget so here we go. Besides I figured that the jig I have constructed would be better than the plywood ones guys are using for their Locost 7 projects

. Russ Noble had also shared that his chassis had moved a little also.
Over the years on our oval track cars the thing that escaped a lot of the guys when setting up their cars was making sure the car was squared.
Cheers Dave