****************WARNING!!!!!**********************
Before anyone gets excited about the noiseless springs...
I bought a set from him and they were crap, they had weak tension and didn't cancel that springy reverbed noise at all. I emailed Adam and he was super straight up, trying to make me happy, but the ones he sent me to replace them were crap too. They canceled the noise well (they have a coating plus some foam in the middle), but virtually NO tension.....I had to use FOUR springs just to get my B tuned 6 to level out suing 13-56s
I eventually gave up on em and went back to using tape across the springs which seems to work well enough. Hopefully he took my suggestions to the next batch of product. Decent fellow to buy from and concerned about his customers, but buyer beware the product just isn't as good as advertised.