I also made a k/s myself, using the eye of an standard non folding Burman welded to an early CB 750 Honda k/s bought from ebay for 9 GBP.
the drawback is the looks, as the Honda one is very straight and looks a bit modern.
the good thing is, it folds next to the gearbox and is completely out of the way, not like the Burman one where only the peg folds.
Also it is longer for easier starting. I mig welded it myself, no problem what so ever, but you need a good mig welder with at least 300 amps on full power.
Welding with electric arc and rod ( the bird shit style) is a no go unless you do it professionally and can handle this ( I cant).
If you want a pic, pm me.
Bernd