I decided to try the same method with my 1:10 model, and discussed the method at the recent GSMEE meeting. Heat shrinking multiple coil cylinders to build up the cannon was shown to be a very strong method, albeit expensive. Then the ring was heated, installed, and it shrunk firmly into its permanent position. The original trunnion rings of the Armstrong 110pr breech load cannons were made with a smaller internal diameter than the barrel. I did look for a minute or 2, then succumbed to common sense and made another. I hear it hit the tin wall 7 meters away. But no luck, so I made another.ДЄnother handle jammed in the Dremel drill. Could not find it, despite hours of searching, including using a fibre optic 5mm diameter device to look under the milling machine and sweeping the floor. And ended up with a breech block which can be levered out, and replaced into position reasonably accurately and consistently. Drilled the fastener holes and attached to the breech block with BA10 bolts and nuts. Then cut the brass approximately to length. Then milled some brass rectangular section (6x4mm) and silver soldered the copper pieces to it. That worked betterвЂ¦ The copper wire was out of the scrap bin. Did not take the shape accurately, and sprung outwards. I milled a round rod with appropriately sized flats, then annealed some brass rod, and wound it around the shaped steel. The top was Loctited into position with Loctite 620, so the silver solder was not disturbed. Next, drill a hole into the bronze block and silver solder it into permanent position. First task to cut out the top of the handle bracket. I had a feeling that it would be a bugger. As you can see from the scale of of my finger tips, they ARE very small. The handles swivel, and push down on the barrel, to lever the block out of the gas tight seal the block makes with the end of the bore of the barrel. Those little handles were used to lift out the 130lb breech block by 2 gunners. In a word, I struggled.Д®nd result photoвЂ¦. The handles are very small, very exacting, and difficult. The language in the workshop has been a touch foul.Д«ecause I have been making handles for the previously made bronze breech blocks. I am glad that I had no visitors to my workshop in the past 2 days.

Dan gelbart flexture plate thigiverse