Nice work to those that got the "microtones" working.
Not a tab user but curious anyway, also part of my question applies to the standard notation.
Questions:
1. when did this happen? I notice it works on lilybin 2.19.38 but not on 2.18.2, would it be hard to get that to work?
2. there are many ways of indicating bends, some more popular then others. If they are clear then it's no real big issue. The type that the bend.ily or definitions.ily emulate typically indicates the standard notation with an up and down bend, and the tab usually joins 2 arrows unless the bends are not the same. I did a hack of this before to get it printed for a friend
http://mglessons.com/lilypond/svg/Ex30.png