Re: pickups for a lp double cut
My Hamer Studio Customs were very similar to your guitar. I tried alot of Duncan pickups in them and finally went back to the original pickups they came with: Jazz Neck and JB Bridge. That set just sounded the best: deeper and livlier and just more fun.
I tried a Seth Lover neck and Antiquity neck but they weren't quite as bright, deep and lively as the Jazz.
And when I tried the Custom 5 and Custom Custom bridge pickups in those two Hamers they seemed to sound great ONLY when I played very LOUD through my '59 Tweed Bassman! (it sounds like a mini Marshall Plexi!)
At lower volumes neither the CC or C5 came to life in those guitars.
The JB just sounded fuller, livlier and better.
The double cutaway seems to give a thinner sound than a single cutaway regular Les Paul, perhaps because the neck isn't as stiff because it's longer and not supported as well as it is in a single cutaway guitar.
The result is less bass and lower mids, IMO, than a single cut Les Paul has.
The Jazz and JB set just sounded fuller and better in those particular Hamers...though in my semi hollowbody Hamer Monoco I couldn't be happier with the Seth Lover neck and Custom Custom bridge pickup set. They work beautifully in that guitar...but they weren't quite as nice in the double cutaway Hamer Studios.