What do you use to make them
what do you use or how do you make them the 3 longitudinal channels for glue and air relief. Thanksbandido said:I use 3 longitudinal channels for glue and air relief. Aside from being relief channels to be able to bottom out the screw, without splitting the forearm, they act as "locks" when the epoxy hardens. Comes in handy to counter the forces applied should the female counterpart get dirty and locks-up.