'I have yet to see one fly a 8000 multistar over 20 minutes and not melt.'
Oh dear Ralphy,
If temps' in the battery bay are hot enough to melt any or all of the home made ABS trays I've seen that really does not bode well for
ANY home made tray.
ABS having a glass transition temp off approx. 105 degs C (221 degs F) and is usually extruded around 230 degs C (446 degs F)
Lipos max (safe?) temp ceiling is around 60 degs C (140 degs F) before irreparable damage will be sustained.
So in theory any 20 min flight with a 8000 multistar battery resulting in a
MELTED ABS tray means a temp of somewhere between 220 to 300 degs F will have been reached....
Resulting in a damaged/scrap battery at the very least.
If all this is true I certainly hope your new tray is made from something resembling 'unobtainium' otherwise claims for wrecked Typhoon H's may well be coming your way.
However as a positive here is one of your satisfied customers using your tray with HiV 8000's flying for 30 Mins and presumably having no complaints he is also claiming many 30min flights on this setup. Do you think he should be warned about the melting tray issue by not following the manufactures advice?