keezer questions

I have been reading all these different threads about keezers. I recently got a 9 cf Frigidaire chest freezer. I do not have a collar built on it, and i am just using picnic taps right now. I live in south Louisiana and the freezer is located in my garage.

My questions are:

I have a STC-1000 temp controller, the temperature is set to 3*C with a 1*C differential.. when the compressor kicks on it runs for about 5 minutes, and it usually takes it about 15 minutes until it kicks back on. This seems to be a rather short cycle time, any suggestions on how i can get it to hold its temperature better?

next question... I do have a fan in the keezer, right now i have it located on the hump blowing to the side towards my keg. without having a collar is this the best place for it or should i try to position it in a better place? if so where?

Bump the differential up to 3-5 the liquid will not see that "swing" in temperature just the air inside. Others have found it also helps to put the probe in water.

any suggestions on the best place to place the fan?

I mounted mine in the coffin blowing down and drawing up wired to the heat side so fans run for 5-10 mins after compressor shuts off to circulate the cool air