Did my first Syniosbuild today. I build one in a small 14500 zoomie and unfortunately it underperformed. In this same zoomie I got a dedomed XP-G2 S3 3D perform up to 54kcd, so I hoped for at least 80kcd with the Synios led. Instead it was just 48kcd, and an uglier hotspot. Of course I can think of a few reasons for the underperformance, of which the heat barrier from ledboard to pill is the main one, keeping the ledboard temperature too high (the board was glued onto the edge of the hollow pill with Arctic Alumina Adhesive, making it electrically insulated from the pill). But I had to re-heat the board an extra time for creating a solder connection between ledboard-core and minus-pad (could have thought of that while reflowing the led 
), that extra cycle at 210 degC on the heatblock could have affected the led performance as well.
Oh well, I made pictures so I may as well report the mod:
-flattended a 16mm Noctigon well on the underside and slightly sanded the side as well to avoid anything sticking out that could short the board to the pill when later glued in.
-reflowed the Synios led on the Noctigon
-scratched an opening to the core of the board next to the minuspad and reheated the board once more to create a connection from core to minuspad with a tiny bit of wire.
-build up a simple 6x7135 MCU-less driver by stacking chips.
-soldered two pieces of copper wires around the edge of the driver board to create a press-fit connection between driver and pill.
-soldered two tiny ledwires to the ledboard and glued the ledboard into the hollow pill while my led-tester (at 10mA) was connected to led+ and pill. This way an unwanted short from ledboard to pill makes the led light up, so I could re-position the board while the glue was not hardened still.
-made a spring bypass at the driver side.
-assembled the light and tested the current. It was a nice 2A precise (should be 2.1A but those 7135 chips are not that precise).
-tested throw at 7 meter with the Mobilux luxmeter: 48kcd
(for fun: stereo!)
