Thanks for the feedback. I put the grips back on last night, no problem, kept the PSI at 30ish, quick and easy.
Will help in the build process too (I think) after you put in your tip weights you can pop on the grips, put the heads on and check everything on the scale to make sure you are getting the swing weight you want for the club.
For my clubs I would stick to the compressor, but I think for customers I will do the final install using the old fashioned method...just for my own piece of mind, I have seen people abuse the crap out of a club and then try to claim it broke 'during the swing' lol