Yes, I concur, neck profile has more to do with my playing (very loosely used , not much of a player) than fret size. A middle-of-the-road fret is probably best.
Further to the guitar on the bench, after cleaning off the fretboard, and Lemon Oil / Hydrate treatment, I can see grooves in the fretboard wood . The previous owner must have played a lot, and must have had a monster grip.
While I have it on the bench, I added "Kinman" style treble bleeds to the (Alpha) Volume pots, 680 pF capacitor and 150 kOhm Resistor. I must admit my ears cannot really hear the effect on my other guitars, but maybe the Capacitor there (0.001 uF) is too large, bleeding through too wide a frequency spectrum.
Also, I pressed the pickup polepiece slugs to a stagger, following what I have on my other guitars.
The polepiece screws are M3, as expected form "Far East" products, and I have managed to strip some on other guitars - I think the soft Bobbin is a factor, but I now see the potting wax makes a hard "spacer" under the screw heads, and turning in the screws meets resistance from this, and strips the bobbin thread. Lesson learnt.