there is a lot of good ideas here..
I do not have a real new bator like that but I have 8 older models.. Mine all have tiny holes in each corner in the bottom.. water runs out of these holes.. put your bator somewhere where an overflow will not damage what is under it. say like the antique table that you were going to set it on..LOL
I plugged all of the holes and drilled new ones on all sides 3/4" up from the inside floor of the bator.. just at the level of the wire mesh screen..
to turn the eggs, just raise one side of the bator up 2" and block it
the eggs will roll to one side. then after the alloted time, move the block to the ther side. etc etc for 18 days.. then remove the block and wait until the egg hatch..
I took a tiny funnel and taped a 9" length of plastic tubing to it.
I can thread the tub to the bottom of the bator through one of the holes in the top and never get any water on the eggs..
I never have to open the bator..
If you smell sulphur, then open the bator and find which egg(s) is bad and remove it.. use and trust your nose for this.. a bad egg can kill the rest of them.. usually around day 14 is when I do the sniff test in ernest.. You do not have to open the bator ..just get your nose close to one of the holes.. If the odor is there you cannot miss it..