Try heat on stubborn rings. I heat lenses on a print dryer so they are too hot to handle without rubber gloves. Once it is hot, then I go after the ring. I have never had to resort to anything that severe as drilling holes in the ring and I have disassembled many, many lenses. Never had glass break either. Heat and cool slowly.
Originally Posted by David Lyga
I filled screw holes on the back of my 8x10 enlarger with these tiny plastic push-rivets: http://www.efc-intl.com/products/pan...shed-heads.htm
I suspect those may be too large, you might try this black plastic stock used to make marker dots if it fits in the hole: http://www.stewmac.com/shop/Bindings...xst=3&xsr=1680
Last edited by ic-racer; 06-06-2012 at 08:56 AM. Click to view previous post history.