Well the first 1/4" jack I had was a good quality one - but it was a hair too tall.
so I had to use a flimsy one out of my parts bin. you know the ones that get bent when you just look at them ;)
but it is shorter and works so far....(knock on wood)
the screws that came with the pup were too long to clear the cone also. no biggie though. the mini pots fitted snuggly into the chicken claw cover, no drilling required and just a little reaming for the jack.
the hardest part was the free hand dremeling (gremling

) for the pickup. not my best job, in fact it's not 100% straight
regarding the sound, I just played over my all tube SF Champ - now that's a coloured sound, not natural at all - opposed to the keyboard active monitor.
totally different thing altogether.
I'm still trying to figure out if I should do the gig with a parametric EQ into the DI box then PA & monitors or if should take a small amp

...and it's only going to be 2 songs....decision, decisions