Found it on their parts web page. Looks like 46g vs. 49g for Hipshot UL with 1/2" post, vs. 42g for Hipshot with 3/8" post. Anyone watching at home may note that Gotoh Res-o-Lite GB350s are 40g each. Similar in weight to the Sperzel locking tuners (I forget their weight). Thanks for the tip, I'm always on the lookout for light bass tuners!