WELD THE FEED TUBE
burb
it will be fine too weld the feed tube to body.....
ally or stainless.
all you do is insert what they call a heat sink into the body and feed tube.....this will disipate the heat from warping the body and just keep the heat(fusion)at point of weld...........
too make a heat sink just get some ally or brass turned down too similar diameter as body and feed tube and insert them at point of welding......
i have done this and its fine ....
only prob is if its anodised it will be hard to weld,youll have to remove anno from area of weld.......
hope this is of help too ya
laters
paul
robotics /weld tech