It's a shame that despite the design being standardised, the dimensions aren't! I fitted a Kent Armstrong (Korean not handmade) precision into an Ibanez last year. I'd bought the pickup and it arrived the day I needed it so I didn't have much time to sort it out. I'd also bought a pair of 'closed' P-covers just as an aesthetic thing on the assumption that it was a p bass cover - it had to fit! No such luck. The KA was too big for the covers I'd bought, yet it slotted perfectly into the stock Ibanez P-cover, which had holes for the polepieces - all lined up perfectly! Still have those covers chucked in a box somewhere, but i doubt there's any point selling them!