Yeah, I'm in the process of modifying it exactly like you did. It looks great and will hopefully turn out to be something i can keep out in my office rather that tucking away in a closet like my other fermentation chamber. I'm planning on using this one for at least the first week of any beer and then transferring to the other fermentation chamber, which is bigger, still temp controlled but only uses a fan and some buckets full of ice to bring down to temp, no heat. However, if I don't brew as much I'll just use this one full time on a brew. Also, love the idea of being able to lager as well! Great job again with the step by step instruction.
One question, where did you run your wires for your temp probes?
I ran the wire for the temperature probe through a small hole in the side of the collar. Can't really see it in the original pictures, but it comes through the side opposite where I installed the light switch. Ran the wires from the inside before wiring it into the stc-1000 so the hole is just big enough for the wires and not the probe.
I considered looking for a place run it through the back of the fridge to avoid visible wires, but I decided to play it safe and just go through the collar.
If the probe wire was long enough I would probably have run it through the same place as the electric for the heating and lights. They go through the collar as well, but down through the bottom corner so they run under the fridge out the back.
Good luck with the build. Looking forward to seeing how it comes out!