So.. still ain't got my Jagmaster, they said it only gonna arrive in january. Damn, I can hardly wait! =D But the guy in the shop said they will do the mods I want to it (well, he didn't say for free, but let's hope for the best =D ).
I did a photoshop mockup of it :

I want it to be a very versatile, kind of "all in one" guitar, so that's why I'm putting P-Rails in it, and of course, the upper plate switches will operate the pickups (I know it will require some routing).
The vertical 2-way Jaguar switch will be the series/parallel for the humbucking mode, and I'm thinking about getting 3-way Mustang switches into the roller knob slots, which will be P90-HB-Rail for each pickup. I just don't know how the switches will fit into the slots, allparts.com says "Requires 13/16" cavity depth and 5/16" x 13/16" slot . 1-13/32" screw spacing" which is about 8mm x 20mm slot. Looking at some pictures I assume Jaguar slots are bigger than that (I hope not too big), so that shouldn't be a problem, but I just don't know for sure.
Also, dunno if that's a good idea or not, but I don't want to drill new holes in the control plate for the switches' screws, as it already looks a bit crowded there, so I think about glueing them on to the plate. And put dummy screws in the place of the original roller knobs' mounting plate screws for the looks.
So this is my plan so far, is there anything I'm thinking wrong or that can't be done about the mod?