How do I choose the right glass tempering machine components for my workshop?

I remember when I first tried figuring out how to pick the right glass tempering machine parts for my tiny workshop, I honestly thought it would be straightforward. Turns out it is kinda messy. One afternoon I swapped out a heating element I thought was fine, powered everything up, and boom the glass came out uneven like it had a mood swing. That was my wake up call.

So I slowed down and started paying attention to stuff like compatibility, temperature control accuracy, and how durable the rollers actually felt. Not just specs on paper but how people talked about them. I ended up browsing through listings on Alibaba just to compare what was out there, and I gotta say, seeing all those options side by side helped me understand what details actually matter. I was not even trying to buy right away, just learning from the variety.

Now I am still kinda unsure about airflow systems and sensors though. Like how do you really know which ones are worth it without wasting money first? Anyone been through this and figured out a solid way to choose?