Penn State sells all types of different pens in the 7mm type. Examples are the SLimline, Trimline, Slimline pro, longwood, etc. These all have different bushing sets. I know the internal diameters are all 7mm, but are all the outer diameters different? Do I have to buy bushings sets for all the 7mm pen types? I'd like to do some Longwoods and just curious if I need to order Longwood bushings too. Thanks!
ACP
I like the article/info that Gary posted. As far as PSI goes, you will need the bushings for each kit (or someone elses that match the diameters).
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