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Invert Roller speargun Z-1 DRAGON

Thread Status: Hello , There was no answer in this thread for more than 60 days.
It can take a long time to get an up-to-date response or contact with relevant users.
@zulus Nice gun!
Some questions:
Are those pulleys custom made or is there a brand name to them?
What size bands and shaft diameter are you using?
Is that a custom made muzzle?

One idea is to do away with that black helper and just pull from the wishbone. Or cut down on the helper diameter. Inverts are usually fairly easy to load the first pair of bands. This way you maximize the force and work put into the shaft and reduce the drag on the shot.
 
custom speargun.shaft 8mm ruber 35cm
 
I made the pulleys myself, just like the shotgun from carbon fiber.140см.8мм Salvimar. И Beuchat Tahitiana Gt Super Steel Spear for Marlin Carbone Revo Concept 7 mm 140 cm
 
very comfortable black helpe. does not cut fingers. 3mm diameter
 
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