Grumpy, my SB's and the ones I've worked on have all been plastic cap front rollers, unlike the above pics by Deviosi and even with no wear in the front roller bar the plastic caps have too much 'play' in them, hence my wanting to machine up new caps and fit bearing to them. The intention is to have the bearinng inside the caps.
I hear you on ingress, but hoping the design would be efficent enough to overcome this.
I'm keen still to so anyone's pictures of their of a grease nipple setup though please.
