Alex I brought the Avery RV-12 tool kit that came with 6 small hand files that have done the job so far although I have brought a couple of longer files for working on bigger lengths of metal I believe a vixen file would be ideal. So far I've only found you have to shape a tie down on the rear bulkhead and for the wings along with a couple of other things wing related, so with a hack saw, a few files, grinding wheel and Scotchbrite wheel you should be able to tackle most things.
I personally would suggest buying a Scotchbrite wheel as it speeds up prep no end and I think the only thing lacking in my toolkit (so far) was a tool to prepare the tail cone skins for lap joints but luckily I managed to source an Avery one in the UK quite quickly.