The 1-emitter or 3-emitter question is due to the FET+7135 board layout. If you want evenly-spaced modes, you need to calibrate the PWM levels according to the total lumen output. Otherwise the output won’t be visually linear, but will be more like an elbow shape. This applies to all drivers with more than one power channel. The X6/X5 drivers will ship with calibration for a single emitter. They can be used for triples, but it’s recommended that you make some minor firmware tweaks first.
The BLF-A6 driver (and the BLF-X6v2 driver and RMM’s FET+7135) will pump as many amps as the battery can supply, until it meets the emitter Vf. On turbo it behaves virtually the same as connecting the battery directly to the LED. These things regularly do 15-amp triples with no issues, and have been tested at up to 60 amps or so. The ~6 amps this light draws are no problem for it.
Exact lumen levels haven’t been established yet, but it should be about half a lumen on moon and 1200+ lumens on turbo. In-between, expect visually-linear spacing.
MaddoXx, you can expect 7 or 4 modes if its being done like the A6. Amazing firmware. I tried the 4 mode and went back to the 7 mode as it is so versatile.