I believe that steff gave up on that project a while back (?)
They use to sell a frame mod so you can fit the mini vbar inside.
MicroHeli had the frame-extenders for the rear frame section to be widened but it was part-of the MH fbl Main-rotor head-assembly (purchase the head and get the wideners).
I know that our own RR Member Justin Stuart (who is no longer with us, grhs) told me that the wideners were great but that he could never get the MH fbl head to work the way he wanted it to (the aluminum is very-soft and bends easily).
A pic. from Justin's set-up ;Justin did PM me quite-a-bit more info about his set-up and a few things I was going to try with mine (I'm still Flybar'd ),
If this interests you shoot me a PM
!Antriebe, die bewegen!
Jazz', Jives & vbar's
Futaba FASST / FASSTest