Thanks for the kind comparison to nosliits trap I've gazed at his build thread in awe while researching the ghost trap! I'm not sure I'm in quite the same league as him, mines kind of a semi-hero to his full metal hero!
The new base is now fitted after a fashion but needs some tweaking as the cartridge isn't quite square. Anyone tried heating resin to bend it slightly?! The tracks are now pretty much finished and I managed to improve the badly countersunk hole using a new countersink bit. I didn't get any pics today as there's not much different to show.
Next up I'm going to be fabricating the release lever and catch, mounting the handle to the back wall, as well as the sprung pins needed to eject the cartridge. After that I'm going to paint and assemble the main trap body and fit all the cosmetic detail parts (still need to get some side rods) before moving on to the wiring etc.