wa2crk wrote:Some perforated plumbing strap loped over the tube and fastened down on the two by four should restrain the tube if it decides to hop out. The strap should not be tight just looped over the 2 by.
Looking at the picture of the tube support castors, I would say to spread the casters further appart so the tube sits down lower. That way there is much less of a chance of the tube jumping out. I would be a little worried also the way you have the castors now.
See haow far apart my castors are. Granted it was dictated by the size of the mounting brackets but I would not want them any closer together than they are. I have done a number of tubes with no problems. I also always make sure I apply downward pressure on the tube.
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