[mactec54]

First, thanks for the advice, greatly appreciated. Second I assume you're recommending plain polyetheretherketone (the beige color) not the carbon or glass reinforced version (I guess delrin is available in reinforced also).

I was pondering JB weld. I need to build up the backside (opposite where the balls run) as otherwise it's going to push back out and impede ball return. As far as the pump I was going to try and heat it and push it back in, else grind it off I guess.

I also need to reball it. I should probably do that (or at least inspect the existing balls under a microscope) before putting back in the modified existing returns .... so I can make new ones.

If you only need to build up the back then JB would do the trick, if you need any in the track that would be to soft, in the track you could drill a hole right through and put in a plastic plug ( tight fit ) and profile it to the shape you need on the inside, epoxy on the back side

[crazybrit]

you could drill a hole right through and put in a plastic plug ( tight fit ) and profile it to the shape you need on the inside, epoxy on the back side

You're full of good ideas. Thank you. I'll see if it will push back with heat, else drilling is a good idea and I'm sure just nylon would be fine for such a small area.

[mactec54]

You're full of good ideas. Thank you. I'll see if it will push back with heat, else drilling is a good idea and I'm sure just nylon would be fine for such a small area.

There is no load on them they are just a guide