Foxfish, interesting method. Doesn't the weld soften the temper of the shaft at that point or do you temper after welding? I am settled on purchasing the Tovarich kit, now just have to work out how to do international bank transfer (Ramon doesn't use paypal

).
I will set the shaft up with the line attached either in the replacable tip or in an adapter piece sort of like this:
Slim Slip Tips
I won't use a slip tip but this illustrates my thinking for line connection. I will use a low profile slide ring like the one shown with the line crimped on either side of it which will stop the slide ring near the back of the spear.
This system should be about as hydrodynamic as possible but I still have to work out if it's practical to do line connection this way or if I just drill a hole through the tip and loop the line through.
Does anyone know of a good source of economical but quality SS 7mm shafts. All I can find in Oz are around $85 each. Much cheaper from USA but usually imperial (won't work with Tovarich).
Cheers,
TJ