My homemade magnetic connectors were not as reliable as I would have liked - current transfer was intermittent and unpredictable.

I had a few trial runs with stripped wire ends as a method for achieving electrical contact, these were no more reliable!  I also considered buying some sprung contacts online...

However, inspiration struck - in the form of a set of cheap wire and brass cleaning brushes! 

After a swift encounter with a pair of pliers I had removed three sets of bristles from the smallest steel brush in the set (four were removed in fact, but one lot were intransigent - and separated into a wirey mess!)

Each set of bristles are bunched in a "V" shape in sockets in the brush head and were easy to remove (for the most part.) At the base of the "V" is a small loop of wire, thicker than the bristles, holding the bunch together - I left this in situ to aid handling and the next step:

Copper electrical cable was stripped of about 12mm of it's insulation, the bare wire was then passed through the "V" of the bristles - parting them was very fiddly! - and the exposed cable was folded over and twisted tightly around itself. 

This process was repeated for each set of "contacts" - and the cables were fed through the holes (slightly enlarged now) that the magnetic connectors previously occupied. 

The bristle-contacts were all then inserted to a depth that ensured contact with the bolts on the traverser deck. 

A blob of glue was applied where the cable protruded from the underside of the traverser base, and each wire connected to the power supply with connection blocks.

I am VERY pleased to say that operation is now 100% reliable!  Operation is an absolute pleasure and should the bristles eventually wear down - I'm confident in my ready supply of "spares!"