HAL and INI files for a "BIG OX" machine with VFD and mesa 7i96 bob...

A few weeks ago, I got tired of fighting with my current setup; (a TinyG board), and decided to upgrade...
After jumping down many rabbit-holes, reviewing countless pages on the forum and getting TONS of help from many kind souls, I have my setup working.
To maybe save someone else from this ordeal, I am posting my config files and setup.

The hardware:                     

1. Mesa 7i96           store.mesanet.com/index.php?route=produc...t_id=311&search=7i96
2. 3 axis X, Y, Z   (2 y motors connect to same stepper)
3. nema 23 motors
4. 20 x 30 inch work area
5. 4  Drivers                www.amazon.com/dp/B00MQGSLNE?psc=1&ref=p...dt_b_product_details
6. 800w  air-cooled spindle       (sorry no details)
7. 110 v  HY HUANYANG  VFD  (sorry no details)
8. Mesa SPINX board ( to convert PWM to 0-10v for VFD)  store.mesanet.com/index.php?route=produc..._id=205&search=spinx
9. Ethernet card  (just for Mesa board)

Notes:

1.  The Mesa board has 3 steppers but I could not determine the HAL command to connect the two drivers, so I just wired them... Works good
2.  If you don't already have one, I would buy a VFD  and spindle as a matched set ... 
3. If you are new to LINUX (as I am) Good Luck!
4. The spindle signal needed to be adjusted to get the speeds to get fairly close; see the "sum2", " mult2" HAL objects...

HAL:
 

INI: