Tube notcher slowly driving me insane....

Now that I have a tube bender I figure next up is a notcher... I have the bearing block and shaft, made that myself as seen here on the JD2: except mine's 6" long with a 20" shaft
http://tricktools.com/tube_coping_machines/Notchmaster.htm

I also got an old Rigid pipe vise as seen here:



Has a 3 hole mounting pattern on the back

Now I'm having a hard time designing a frame for it that will hold the vise and hold the bearing block in such a way that it will rotate/pivot....

I like this guys design:
http://pirate4x4.com/forum/showthread.php?t=869820
But now I have a pipe vise I want to use......I mean this thing is BIG though.....

Any help or ideas for a rigid frame would be lovely....Thanks

 

I use one of these, works great, not too much $$. No insanity. http://www.eastwood.com/pipe-notcher-holds-up-to-2-dia-round-tubing.html