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Not because I "know" what I'm doing ..... :p I just like the idea of solid, as opposed to tube. OTOH, the important thing is that the geometry is correct and the gizmo is secure. :gl:

If I was going to do it I would get some solid round stock and have a machinist mill a slot for the blade. Give enough clearance to epoxy the spine into the milled slot. Make sure the OD of the stock...

If you know a competent machinist with the proper tools and skill it wouldn't be that difficult to machine a back out of stock and epoxy it in place. If you found a similar model to get the proper...