I seem to like lots of neck types. My Epi Tribute + has a wide, flat, medium thick neck. I've had Strats w/necks all over the charts, but all good. I like to work on guitars. Electronics or the setting up. I put the strings low as possible. On that '56, I would do a pup upgrade if really needed. All real-type P-90's are a little noisy. Gary Clark Jr. uses P-90's really well on his Casinos. I like that guy's work. Seems like there's a little Hendrix in him. I notice you have 3 Carvins. Those look to be well built. I've used their amps which are strong, toneful, & cheap.