ProSoft dose anyone use this instead?

[windlaker]

I have been building my own clubs for a few years and during a recent trip to our local hardware store I had an aha moment, why not use 5/8th inch backer rod for vibration mitigation. Just shove it down the shaft like you would ProSoft. My club builds have come together fine with swing weights that didn’t require unusual adjustments to stay at my preferred D2. I’m cheap, umm frugal and it works for me!