Sorry, dont have either,, busy with production as it is now...

Oh well i dont really texture that much,, i more of a modeller and VFX person that texturing...

But to my understanding,, the walklenght is a kind of a calculation that happens. Its like the cpsovler scale you have in maya cloth...

Haha... told you i am not into UVs and texturing,,

The reference vertex is more for a center or 0 axis point of reference that it takes. Dont really need one. But its there,,, I have tried both with and without it... And in many times it just helps in giving my no flipping problems and gives a better pelt.

Ok good luck with the pelting...

But somehow not all things that are free seem good,,, Hahah

You will end up thinking,, i need to re UV this guy according to my style that i texture....

Oh well thats another story,
Kumar