That's awesome!
I built my own wine refrigerator (see
http://www.winemakingtalk.com/forum/f4/designing-working-refrigerator-storage-unit-42562/#post480907) but it only holds 84 bottles, and is now full. I don't have room for another
I will leave my lower end kits on the floor in the basement, where it averages 19 C (66 F) with a few degrees variation from summer to winter.
It is interesting to me that you have cellared your reds for 4+ years. I think that some of what I regularly read about people who start enjoying theirs "early" (say at 6 months to a year) probably aged theirs much warmer and thus accelerated the process significantly.
I am hoping that patience will eventually pay off with an even better wine due to the cool cellaring.
It is good to hear that aging significantly warmer won't end in tears as I will also have to do that with some of my kits.