Not sure of string gauge, it's the ones that were originally on it by the looks. And the interweb, including the official Gretsch page tells me nothing. I have a set of 13-56 lap steel strings I should probably put on it.
Tuning is Open D. Will look at C6 soon.
At the moment it's going into a Danelectro Cool Cat Drive > Modtone Mini-mod Reverb > Fender Champion 600 low (clean) channel. If I have the drive and volume too high on the Cool Cat it gets a bit shrill.
There's nothing wrong with the sound as such but there's some stuff I like that has a thicker sound.
The pickup is kinda P90 size (but maybe narrower, though wider than a standard single-coil) sitting in a hole. So it's probably not replaceable by a person of my skill level
).
In the picture the pickup looks like it might be sitting on top like a dogear P90 but it's actually sitting in a hole, the silver surround is 7mm below the wood top, and there's another 10mm under that. The top of the pickup is 5mm under the bottom E-string and 5mm above the top of the wood.
It's possible the tone control isn't working properly so I'll look at that. Seems to be an all or nothing thing.
Thanks for the suggestions. Some things to chase in the tone quest!