Thermotron S-16C Chamber, upgraded controller with boost heating and cooling

Description

If you are looking for an excellent Thermotron S16-C, you just found it. See the pictures!
This chamber has a cascade refrigeration system to go down to -70C
After I bought this chamber, I performed several special upgrades.
1. I added additional heaters for a total heating of 5KW
2. I added an LN2 port with internal nozzle for boost cooling (20psi LN2 supply)
3. I made a custom black anodized front panel with rocker switches, colored indicators and a Watlow F4 controller (schematic included)
4. Repainted it in original color.
5. Added casters
All these upgrades were designed and implemented by an Electrical Engineer (me) and all the components and Teflon wiring are top shelf.
The interior dimensions are 30" x 30" x 30". It is wired for 208VAC 3 phase.
Exterior dimensions are 44" wide x 55" deep x 80" tall and weighs about 1800lbs (best guess)
This is really a magnificent chamber. The only problem I ever had during its limited use over the last 17 years was a bad condenser motor. I need space in my lab so its time to let this machine serve someone else.
This chamber is built like a tank with a weight to match. Buyer needs to arrange shipping with a truck and a lift gate. I will help however possible.