Just read your post and I know I have got to tie some to-never tried before.
Off I went...mmm awkward little blighters amant they. Took me 2 mins to do one then I hatched a plan...did four in a minute then


Ok put the fat end in the vice. Now get the dubbing needle in the middle of it and bend 1/2 back towards the vice, whilst holding it on the needle give it a gentle tug. Remove the needle and the leg should now be kinked back towards the vice. Grab the loop in your right hand and fiddle the pointy bit back over as if going to tuck back through and knot it...when you look through the loop and can see the pointy end grab a spring loaded fly clip (you know one of them things you put flies on to dry). Insert it through the loop, compress and hook the fibre, pull through gentle. Before you tighten you can still adjust where the knot lands.
Works a treat. Dragons Den here I come!