lovely, just wish back in the day when I helped dad we had taken pictures of stuff he did...just memory's but good one.Interesting thread and for some reason one i've just delved into.
My effort,finished this slap today to a school refurb increasing the opening size from roughly a metre to just shy of 7m.Steel was just over a half ton and everything straight forward although the propping system is a far amount of work for the time it's up.View attachment 448479
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only .060" to come off, light cuts so I had no problem holding them on the thread, nuts ran down just fine afterwards.





