Thanks for all the advice, folks... much appreciated.
I haven't actually heard MQs, but I know I like the sound of P90s in a Les Paul.
I'm currently thinking of Stormy Mondays (probably AIV), mainly because I have a cheap, one-pickup DeArmond LP-Junior style guitar with a cr@ppy humbucker, and I'm definitely putting a MQ in that at some point... if I have those two set up like that and decide that MQ's really are the bee's knees, I can swap the SMs into my Epi Les Paul to make way for MQs in the Hagstrom... potentially complicated, but hopefully sensible!
Is it worth getting all the electrics in the guitar changed as well, or not so much? I ask from a position of complete ignorance... pots, etc - I don't even really know what they are :lol:
Well , you certainly won't be the first one around here to 'migrate' pickups through different guitars ; as in my '335 clone' I tried AII Stormies, AIV Stormies , Gibsons ( that came out of my Les Paul when I gave it Mules ) and M.Qs. This had to be a 'labour of love' - as changing pickups and general electrics through the 'F' holes in a semi- acoustic is a bit like decorating your hallway through your letterbox.
To answer your question specifically, I always fitted new 500K pots and Sprague 'Orange Drop' 0.22 microfarad capacitors, to replace the cheapo ceramic caps of the same value that where usually in there. If (however) your pots feel smooth enough, they could already be the narrower shafted , lower budget 'Alpha' pots that tend to get fitted to most production guitars that have not come out of America- or some respectable stable. That is to say that they probably will be good enough, and perhaps only the two capacitors on the tone pots need upgrading.
As has been pointed out in a couple of other threads recently, the online parts store 'Axes'R'Us' do an all in one kit of pots, caps and connecting wire. Do be aware though , that as ( I think it was forumite 'Twinfan' that last pointed this out ) you cannot just buy the higher spec CTS pots, as the holes in your guitar's body will be a bit too small, and the original knobs will not go back on the CTS brand pots.
With my Jazzer ( see avatar ) - I
carefully enlarged the holes for the volume and tone controls - and started all over again with pots, caps AND full size 'Art Deco ' knobs of that ilk - to match my lovely B.K.P. Manhattans. You ( or the technician ) will have to drop the knobs and wiring out anyway, to solder on the new pickup wires, so best get it all done at once, especially as you have already got a very reputable guitar at a bargin price.
Hope that sheds further light on the matter for you . :)