No heatshrink - no problem.

[Deleted member 4366]

I was just surfing Youtube, when I came across this at approx 10:45 mins. Lots of other good ideas there if you want to watch the whole thing:

 

[Benjahmin]

The guy's obviously a nutter and total genius. His tidy workshop puts me to shame

 

[Nealh]

Undoubtedly very imaginative and a nutter I would say.
I have watched his video of the diy spot welder where he made a dodgy battery, most of the welds were charred and holed .