two comments.
i would buy a "y" for the light socket and use two smaller bulbs incase one blows.
I would look at temps on each corner to make sure that single fan is doing its job. anoher high up on the opposite wall may supplement air flows.
This is a great bator. Really nice finish. Well done
actually did this 20 mins ago, added a "y" another 72 watt halogen, and added another thermometer, in opposite corner, single fan seems to do the job, having the heat sinks under the turner helps as well, I have never tried the dry hatch method, may give it a try as the weather here warms up, and I can collect eggs from my Cochin pair, (Duane Urches, bloodline) I have hatched chicks from them before, very nice Black Cochins. The eggs I have set now in a different bator are on day 19, Salmon Faverolles.