Im working on some holdsworth style legato runs, i want to develop the same pull off technique he use, when instead of actually pulling off the string he hammer with the other finger where the next note is, cause it give a more flowing like sound

but im having some trouble getting enough rining volume

does anyone have any expirience with this technique ?
I do, it's all about taking it slow, finger independence and developing strong, clear hammerons with each finger. Also, your index finger is probably terrible at hammers - get that sorted.

Finally, ask prophet of page (tom) - I'm afraid my experience and ability is limited to a few string crossing licks.
You're right about the index, i feel like im relearning how to play

btw, nice vids
Pretty young things sound really sweet, and your right handed legato is awesome.