Aside from the M21F, I had added minor to moderate modifications to most of Simon's flashlights. I finally got motivated, so I decided to add some modifications. This M21F was the first Convoy flashlight I ever bought.
As a first step, I've replaced the tail cap with a double spring. As for the other matters, we will address them once the parts arrive.
I also bought an M21K. I can't reveal the details, but I plan to make some modifications that are different from before. We will provide an update on this matter as soon as we measure the performance after the modification and confirm the improvement.
by Garikarikun
