I don't know what do you mean by "safe", it could be safe to use that host at any current, only difference is lumen output and time until host reach temperature that will trigger OTP protection.
E2L is an awesome host and spreads heat throughout entire body (good) but its only a matter of time before it steps down. I have all 3 leds u mention with FET driver in E2L and 1 S2+ XP-L HI with Cu pill and LD-B4 and mosx+FET. They are all really nice.
I plan to have the XP-L HI exchanged by the OBF in the BLF GT Mini but I'm not sure how sensitive this LED is when doing the reflow by oneself. Is there already any valid information when the successor of the OBF will be available?
I meant it regarding the driver plate. But as the head of a 8×7135 Convoy S2+ can reach temp easily above 70-75°C in still room temp air in less than 15 minutes, probably 6A with the E2L host will mean only about 3-4 minutes ‘turbo’ usage before driver protection shutdown mechanism at 105°C will kick in.
LD-A4 can handle 6-9A in triple setups,but only with good thermal path between driver's FET surface and flashlight body, something like S2+ thermal enhancement kit from my store would be required.
LD-B4 doesn't have these problems, but mosX boards must be used, and problem with JAXMAN host is that it uses non-standard ~19mm PCB diameter, with max. allowable diameter of ~19.5mm, at least that is what I've heard. Maybe new version of hosts allow 20mm pcbs?
Usually you can sand down pcbs by 0.5-1mm, but with mosX is there is high chance of short between copper top layer and core.
SinkPad makes both Aluminum DTP boards and Copper, while Noctigon are only available in Copper. These are the most recognized brands of DTP boards here, but there may be other brands that do Aluminum DTP boards as well. There is a metal coating over the contact points of the Aluminum DTP board to allow soldering the emitter.
EDIT: We’re talking about led4power made DTP boards here, which are all copper.