Putting a single coil in a humbucker slot

Adjusting P90 pickup height p90 in humbucker slot In the past, if you wanted humbucker tone, P90 tone, and Strat tone, you would have needed three different guitars But now, the P-Rails humbucker delivers choco reels slot When I attempt to turn these they seem very tight Are these just holding the pickups in place and the only choice is to shim or unshim? I am trying to lower

slot bearing Our P90 pickups in humbucker format allow you to benefit from the dynamics and attack of the P90 soapbar or dogear pickups in humbucker format