It was very easy and fun to make but the only problem is that it is difficult to keep a consistent temp in the winter if you keep it in the garage (where we kept it). It was great for spring and summer hatching. (And it was rather large) Hatch rate was excellent, very close to our 1202's.
RP
that is a fine looking bator, you've done a excellent job. one thing that may help stabilize your temp, is mass in the form of containers of water, sealed to prevent evaporation. the more mass in the bator the less effect air temp changes outside have on internal temp of bator.
In my styrofoam bators, I place sandwich bags with water in them. under and around the turner. realy makes a difference.
bob