I think the "mini" refers to the size behind the mounting, not the toggle itself. No real advantages or disadvantages, except of course that they're smaller / shorter, and therefore easier to fit inside a body cavity. Guitar body cavity, that is.
The poly is going on nicely. I'm using a wipe-on formula but applying it with foam "brushes", which builds up the thickness nicely. As they're as cheap as chips, I can afford to throw them away more or less after every coat. I'm putting 3 or 4 coats on, then rubbing back to 600, them one or two final coats before final sanding and polishing.
I'm now waiting for a job lot of 400 / 600 / 800 / 1000 / 1500 / 2000/ 3000 grit hook and loop sheets for my orbital sander to arrive, should be today. Once it's been sanded down to 3000, I'll finish up hand sanding t0 5000, 10,000 if I've still got some, then I'll get out the rubbing compound and Maguires (sp).
I've also got hold of a pearloid scratch plate, no holes for knobs or switches, which I'm going to cut back to suit and to expose the maximum amount of wood. It'll be drilled for three pots - two volumes and one tone, kind of like the controls on a Flying V. The tone only gets "shared" in P2, after all.
The neck should be here this week. I'm going to gloss the headstock but leave the back of the neck bare. If I don't like it it can get a thin layer of satin polyurethane buffed back.