looks like what I am planning/hopping to try and do tomorrow with my coke machine ( using a smaller fan on a old cell charger) . But I must ask what the water bottle do ?? outside of maybe taking up space and being used to release some heat later on ?? ? I not using doing 4+ cltuchs so I got the room to place larger bottles and what not. I think I will only have 2 clutchs in the fridge once I get it done ( this year ) and redo the heating with 11 inch next year... I only got 3 or 4 inch on hand right now. plus the unit in my snake room so i get a bit of a preheat for it now. I just needot rais it a couple degrees for the eggs. and I figuer a large U shape in there will do just fine this year. I also wonderwere the best palce toset a temp probe insuch a large unit ?? in a dummy box or just to hang loose in the air??