Heated Chamber 3

I finished my chamber heater project. A 110V fan was the key to making it work. I takes about 20-25 minutes to get to 50 degrees.
There is one minor problem.
50 degrees is not suffucient to stop ABS from warping. I tried printing the following:

Without a brim, the part didn’t get halfway done before warp made it slip off the bed.

I tried doing it with a brim, but for some reason I couldn’t get a good first layer to go down.

Here’s what the final assembly looks like.