The one method you can use is to clamp the head in a vise, then make sure the grips are logo up. You could also stick the shafts in the heads, set them at address, and try to twist them into position.

The preferred method (to me), is to install the shafts as close as possible to grip up, let the epoxy cure, then move the grips.

If you're going to be doing your own regripping, I will tell you this for your own good: Buy an oil-less air compressor. It will make doing regripping fast and easy (and, well, ok, fun).

You do NOT want to be messing around with solvent and tape and trying to ram a grip on while the tape is wet... I did three grips this way, then bought a compressor.

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True Length Technology Fitter - www.truelengthtechnology.com
It's live! - www.ShipShapeClubs.com
PCS Class 'A' Clubfitter

A new highlight: Golfing the home course on Christmas Day.

I say it too often: If it's golf club shaped, you can play with it.

For the record, I'm a club doctor, not a swing doctor.