Make your own collectors for Bachmann Locomotives. See photographs
These collectors are to similar dimensions to the Massoth collectors but have brass plungers for improved wear against cast iron wheels.
They fit Bachmann 1:32 locomotives to allow for the increased reach needed for wider wheel back to back where finer standards are used.
Ream the existing holes with a 6.0 mm reamer. A push fit is normally sufficient without the aid of any adhesive.
When drilling the bores of the Delrin bushes, drill first at 4.9 mm, then 5.0 mm to avoid drilling oversize holes.