On my install I noticed the lower dash was getting frosty cold, not good. So I removed the lower dash and made pipework out of black water pipe (thinner wall) and insulated it as best I could and made the defrost ducts to be open or closed, no more frosty lower dash. Using a meat thermometer, the RF temp gun is useless here, and have a reading of 54f, 85f ambient,at all ducts.
I've also insulated the return hose to the compressor (no, I don't want to debate this), I haven't had the opportunity to evaluate this as it has not been too hot here.
This is EXACTLY what im talking about. 54f unfortunately isnt great
nice to see someone does not think im insane