Constrictor knots and mean green rubber

Thanks Sharky. I just noticed the knot you use to tie the wishbone to the loops, looks more secure than most. Like a cross between a double sheet-bend and a reef knot (aka square knot).

I see Bill uses the classic sheet-bend. I know they must be secure but for some reason I have never trusted them. So, for example, I tie my muzzle bungee to my mono spearline* using a double sheet-bend, which I discovered recently is somewhat harder to untie and re-tie while in the sea than a single sheet-bend, ahem.

* I used to find the heavy duty bungee clips by RA hard/painful to open and close at sea. When I switched to a lighter set-up, I found the Beuchat muzzle bungee clip very flimsy and it rusted away in a year or two . Clips also rattle against the barrel and can mark carbon barrels. I try to keep things simple and my spearguns super-lightweight (as Omersub made them that way), so replacing the noisy, heavy/flimsy clip with a simple, light, free, quick tie/release knot (sheet-bend) was an easy choice. BTW I now use Omer or Salvimar rubber-bone bungees or a piece bungee cord (thanks Foxfish), again cheap, simple, streamline, lightweight . BTW Spaghetti said that Italian spearos often use old inner-tube rubber

This is a little bit off the subject but I had a puzzling experience yesterday. I was using my Abbelan 120 but the visibility was limited so I decided that I might as well use my Abellan 110 and have the greater ease of handling. So I went back to the boat and changed guns and then was unable to load the bands on the 110. It wasn’t just difficult- I couldn’t do it. I had no trouble loading the 120 and the bands are cut to the same stretch ratio. Today I removed the bands and verified the length. Then I thought I might have used 15mm rubber by accident but I used calipers and verified that it was 14.3mm rubber, same as on the 120.

Now what? I guess I have no choice but to make new bands a bit longer but I wonder how much longer. This has never happened to me before.