There’s a thread I originally set up with the intention to focus essential communication between BLF and Sofirn.
The general Sofirn development thread
Everyone is encouraged to post his/her ideas, suggestions, questions regarding Sofirn flashlights there. I know that Barry (Sofirn) is reading our input from time to time and appreciates our thoughts. Some of BLF’s ideas were already incorporated in final products.
Concerning C01S in particular, the odds are not too bad that the C01R UI (2 mode groups with 3 brightness levels) could also be incorporated in future batches of C01S. I have been talking to Barry about this topic already but changes like these require the right proportion between costs and benefits (= enough demand by customers). The new driver as in C01R is slightly more expensive.
I am not sure if the driver of C01R, programmed to work efficiently with a low forward voltage XP-E2 photo red emitter, will work properly with an SST-20 LED.