Hey man o' big light! As you've probably noticed I haven't been around for awhile. My workbench exploits created some serious tension in the house and I had to back away a little. Then there's this very insane two weeks of desert Rat Patrol that somehow manages to keep the Death Ray in the family's good graces. That story has grown since 2 years ago, save that for another time. I know you miss your -1 & -3's. The offer is still good if you're ever up in the Seattle area to partake in a handling run! But please tell me what is up with the Flashlight Forum I just checked out and saw your Blitz project so well detailed?
I have Romisen complete. I stuck SST-50 directly on a new cooler using "Arcit Aluminia" for perfect heat dissipation. And I made a cooler from above the SST-50 from 0.5 mm Al plate. This plate also divert heat to the Al reflector.
I have done thermal protection in Romisen by using PTC thermistor. This protection reduces power LED when heated above 60-70 °C. Maybe it's too small temperature, but I'm afraid destruction of the LED (after previous destruction of the LED on the bad PCB, but LEDs are directly to cooler now).
When I set about 90W, the SST-50 are now very hot. And flashlight is also hot=> thermal protection reduce the performance of SST-50 => flashligh will be lit at full power for only a short (but I'll have the assurance that the SST-50 don´t destroy ...)
Initially I thought that I make more Romisen @ 6xSST-50, but the production is very difficult ... It will be probably only one original, yours ...