Mr. Kulaga's DRO...

Hi all,
Anyone know where I can find schematics for the 4 axis version of
Mr. Tom Kulaga's DRO+ hardware?

I seem to be able to find the 2 axis version, but not the 4. But I
may just be stupid. If so, kindly educate me...

Has anybody in this group built and/or used this system?
Ipmressions, thoughts, warnings?

Thanks for any pointers,
-AL