Quite detailed mounting and options instructions by Hera’s US distributor:
http://www.youtube.com/watch?v=ItpgjLvx14w
mounting mine:
Really feels awesome- the pointability is amazing. Just have to mount my Glock 17 in it as I don’t want to get rid of the
Heinie sights on my G19. The downside is just that one has to buy optic, forward grip, etc.!! :D:D
Neat system for the Glock.
[b]For users in the United States wanting to use this on their Glocks they will have to have an approved Form 1 registering their own Glock as a SBR (short-barreled-rifle) which will cost $200 for the tax stamp or an approved Form 4 for an existing Glock transferred to them which too would cost $200 for the tax stamp. Assembling this stock kit or any stock kit on a firearm with a barrel less than 16" would be a felony unless you had an approved Form 1 or 4 with tax stamp.
FFL/SOTs with pre/post-1986 ‘dealer sample’ registered machinegun Glocks could use this stock kit also.[/b]
Done!! 
Just another item to add to my “wish-list.”
Have you been able to take it out and put some rounds through it?
That is way cool!
Will be bad ass when you throw in the 33 round mags.