Great to hear you've solved the gas problem - that was an issue for me as well. At first I thought I could use flux-cored wire instead but I was horribly mistaken - that stuff is a mess to work with, with all the wirebrushing needed. The cost of disposable gas cylinders is high when you have all that practising to do, I still have that same problem with my TIG as I can't use the large cylinder I have for the MIG (being an Argon/CO2 mix).
Wherever steel is thinned and rusty, I found the going is so much more difficult than the nice clean practice pieces. Continuous smooth seam welds seem a distant dream, don't they. I think I'll have to aim instead for lots of neat, consistent tacks and slowly get them closer together. I guess it all depends where the weld is.
For the lap welding, do you have one of those joddler tools? I know it's considered crude and bad to have a double-thickness, but it seems to end up pretty flush. I suspect the double thickness practically disappears anyway if the weld bead is strong enough to consume it.
I'll look forward to seeing some photos of where you joined the sills
I'm kinda stuck on INNER sills at the moment...
-Alex
Wherever steel is thinned and rusty, I found the going is so much more difficult than the nice clean practice pieces. Continuous smooth seam welds seem a distant dream, don't they. I think I'll have to aim instead for lots of neat, consistent tacks and slowly get them closer together. I guess it all depends where the weld is.
For the lap welding, do you have one of those joddler tools? I know it's considered crude and bad to have a double-thickness, but it seems to end up pretty flush. I suspect the double thickness practically disappears anyway if the weld bead is strong enough to consume it.
I'll look forward to seeing some photos of where you joined the sills

-Alex