I have them all on my bass and it really opened up the sound,
clarified the pizz and added more highs to give that Italian sound to
my bass.
In one I have a video comparing the sound of the same bass with
various end pins. I have the sister maple low mass tailpiece on my
bass.
The tailpiece is also a work of art.
http://www.youtube.com/watch?v=XNqctOTMyjg
Now he made extras which I'm selling for the luthier. They are listed
under here or just search on ebay for lowhertz
See
http://my.ebay.com/ws/eBayISAPI.dll?MyEbay&gbh=1&CurrentPage=MyeBayAllSelling&ssPageName=STRK:ME:LNLK:MESX