Okay, so getting back on-topic:
I have managed to grind down most of the parts that needed it, and removed a few unwanted clips. Also managed to aquire three working cranes in a job-lot of micromachines parts off eBay. Next task will be deciding which one/ones to use and where to fit them.
Unfortunately, won't be able to take it much further right now, as all my model making gear is packed away while we rearrange the house.