His order page.
7. batch now active here Attiny 25V running Bistro HD OTSM OTSM works perfectly with lighted tail cap and hot light no more OTC timing issues 2S Bistro OTSM now on all sizes but 15mm available, 15mm 1S OTSM implemented with design change or Attiny 85 running NarsilM v1.2 with latest version with fixed bugs Narsil manual, a lot options to configure this one NarsilM driver can be thermal calibrated as well you can choose the temperature for step-down, but change it later in User Settings …