Hey I'm glad you got your system corrected. 52F is OK for a hot humid day when you taking in outside air. It will always blow cooler if you switch to recirc. If you dont see anything in your sight glass this is a great sign. The system is designed to take a variance in pressure (on hotter days, pressure's higher)

Recirculating air brings me to another point, I hate how there is no pollen filter on the T100. I have car the same age and there is almost NO dirt/dust coating parts under the dash like on the T. I wonder if we can retrofit one?

Yeah electrical terminals arent smooth and it will prevent corrosion if you can seal it up with oil or grease. But there are conductive lubricants available just for this. I think for the best connections (lowest resistance and heat) clean them with Brasso or Gun-Strip and then apply the grease.