I wonder if Robo would be so steadfastly defending the worst type of metering device in the industry if Goodman announced that they were switching 100% to TXV metering?
My veiwpoint on TXV vs fixed metering is shadowed by the fact that I live and work in a part of the country where it is common for me to be working on a system in outdoor ambient and indoor conditions that have a "-" by them on most manufacturers charging charts for fixed metered systems.
Heck, around here we have many hours a summer where, even with normal indoor conditions, there is a "-" on some charts for our outdoor ambient.
In my opinion, fixed metering has absolutely no place in a system that is expected to operate regularly in 100º+ ambient conditions.
I also am of the opinion that a manufacturer should not be allowed to sell equipment in an area unless they make available the performance data for that equipment in the ACCA design conditions for that area.
I can think of a number of brands that would have to publish it or pull out of my area if something like that went into affect, lol.