Wobbly neck pickup

I routed out the neck cavity in an MIM tele, and glued in a block so that I could mount the pickup to the body. The only problem is that with springs or tubing it seems to rock back in forth a little bit inside the pick guard.

Any good solution for this? I'm afraid the wobbling will eventually eat away at the pickup mounts on the pickup from my hand hitting it.

I've actually never seen underneath a tele with regular routing so I'm trying to figure out how to do it best.

You could try to use a piece of a mouse pad under the PU to support the springs. However, some say that it affects the sound in a negative way. I have not heard that when I have tried, it became however less prone to squeal. YMMV.

All pickups that are mounted with two screws will wobble a little. Its inevitable. Les Paul's do too. The exception is like a tele bridge pu that's mounted with three screws. It shouldn't cause a problem or ream anything out and regular playing will cause no problems. You could do as stated and take a thin layer of foam and wedge them gently on both sides of the pu to ease your mind.It's worked great for me when I've done it. Good luck.

I put the original pickups into my 68 and bolted the neck p/u to the wood using the original screws from when I bought it way back.

It rocked back and forth with the new pickguard so I put a small piece of sticky sided fibre insulation under it on each side to prevent movement.