I just replaced the tuners on my '59 tribute with single line Kluson re-pops. Right out of the box I noticed the the heads were beefier: shaped slightly thicker, with sharper edges than the AVRI tuners I had on there previously. It's tough to see, but the difference is tangible. Just curious, are these Kluson re-pops true(r) to the original pre-CBS tuners in this sense? I haven't played a pre-CBS model in years and do not have anyone local that owns one for comparison.