Hi,
I've just read all your page : https://en.gradient-sg.com/t962/
Wow, I'm impressed !
Your strategy is different from the last compromise : mix hot air with little fan blade inside (which also is a hard modification).
So your new PID in firmware with 6 new IR lamps can be really better.
Do you thing you will sell your modified T962 in the future (without warranty ?) ? Or a modification Pack as ESTechnical was doing before ?

I don't find any picture of your T962, so my question is simple :
Do you use the T962 original model (before 2020) or the T962+ upgraded model (after 2020) as a base ?
Here is my little drawn to see the differences (air flow direction is different) :

If it's the T962+, I'm trying to understand something important :
During the starting of cooldown, hot air and cool ~20° air (more or less) are mixed fastly
=> With old T962 cool air is arriving directly on PCB top on the chips
=> but with new T962+ cool air is arriving on PCB bottom (not directly on PCB top) and some air circles turbulences could be created ? What do thing about it ? Do you think it's a problem or not ?

PS : this software is in C++, how do you compile it ? Is it possible with Qt4 ?