the plan is to put the pit pony out to pasture -
Really, really disappointed !
( By the way do you mean 'out to actual pasture' or 'out to the heavenly pasture' ? )
However looking at the operation of the 'Fulls'
Would it work if a full wagon leaves the mine entrance and using gravity runs into the 'Fulls deadend'.
The final setion of track takes an uphill rise.
The wagon slows to a stop after the point and then runs back downhill to the top of the'Fulls incline down'.
(The point is either a spring loaded or 'one way' type point.)
The full wagon then sits at the top of the incline waiting for the next magnet to start its journey down to the bottom.
This would mean that the wagons would come down the incline singly unless thay were stored between the point and the bridge before starting the downhill trek. ( I assume that they are to decend under control and not free rolling under gravity )
Regarding the points I have seen a layout by Gerry Hopkins that had alternative routes for different trains and NO moving parts on any of the points. Not sure how he did it but it worked without a hitch at a couple of exhibitions that I frequented. Spring points might cause too much friction for little skips.
Regardins the couplings I have three of Steves mine skips and have fitted them with hook and bar couplings of my own design.
As yet I have to test them under 'normal' operating conditions so I have no real idea if they will work in an exhibition envirionment.
Basically thay use a brass wire fixed at one end of the chassis and with a hook at the other. The point of the hook points skyward.
This hooks onto a simple wire which goes across the chassis beams ( which run the full length of the skip )
The brass wire has a piece of iron wire soldered to it which is pulled down by a electro/permanent magnet set between the rails.
However the couplings are single ended so they should work on my proposed layout but your layout reverses the skips and so any coupling would have to be double ended. Twice as much work.
I had to replace the supplied wheels and axles as they were steel and refused to leave the vicinity of the uncoupling magnet.
I have tested them on a length of track and around a fairly tight curve and they appear to work without problems.
Hoping that this will keep you occupied for a little while.