Well, done for now at least. After watching several movies on it, I believe that its pretty stable.
The highest runtime temperature I remember seeing was 32.3C — which isn’t bad. It usually manages to say within 10C of the room temperature. I’m fairly satisfied this is ‘safe’.
The other two fans are really causing a racket at this point (relatively). So I’ve moved the temperature probe and will probably swap those fans real soon now. I put my probe near the registration board above the green CRT. This should be one of the ‘hot’ spots in the unit — since it is at the ‘top’ of the enclosure.
I believe the internal temperature stayed around 30C.