Cheers mate, and thanks again
More really invaluable info!
I got my crucible in the mail this morning! I've stuck the box in a plastic bag and put it on a shelf for the time being.
The Miller table is coming along, but I've had some hiccups on the way.
Two main issues are drilling holes without burrs in the polypipe spray bar and getting the rubber (conveyor belt rubber) to lay flat on the glass bed. If anyone wants real rubber sheeting I can get it really cheaply!
Think I've got the holes in the spraybar sorted, but I had to try different drills (1mm, 2mm, 3mm) a few times. Also tried sticking a bit of wire into a soldering iron to melt the holes (not accurate method at all), but the drilling seems OK now. There are still burrs on the inside of the 1" pipe, but the holes all seem to squirt (slowly) pretty evenly. Ordered a speed controller for the 1100 gal. bilge pump last night for fine tuning later. At the moment a plastic ball valve will have to do.
I think I almost have the rubber sorted too. Yesterday was pretty warm up here, so I put the rubber on the glass and left it in the sun all day with a couple of bits of wood across it. I moved the wood around every couple of hours. It got a lot better, but still didn't sit flat, so I went and spent a bit for a can of spray adhesive from Lincraft. Chic there had very nice upper shelf assets, so I kept asking her silly questions.
After drilling a good spraybar and testing it, I installed it on the table and tested again. BUGGER! When the water cooled the rubber it lifted just a fraction! I reckon I didn't use enough glue under the rubber, so will sort that in the morning. Will use thinners to clean the surfaces and give the glue a fighting chance this time.