Viewports

21/01/08

I’m drilling the holes for the retaining rings.  I made a paper template which I am using to mark all the holes.  I will then use this template eventually to make the retaining rings themselves.  That way all the holes should line up.  I put down a 2mm pilot hole first before drilling out the hole to 5mm.  It was actually quite tricky to get them centered as you don’t have a lot of leeway.  Depth of hole, 1/2 inch as per the plans.

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