there are more TMC magazine winders out there. but this one is made to work for a dual mag setup.
shell: Wall line count: 4
I'm not sure it the supports are really needed on the main part. but I used it. for the handles it won't be needed
use the players to old the heated part to slide it over the Hex key and make it curve over the bend. so it will not slide out or bend later when using the winder. and of course try to keep it roughly in a straight 90 degree angle.
Note for when adding a cord to this winder.
use a stiff none flexible one, other wise it will get tangled during the winding process
and of course let the thread locker dry before using this winder.