Ordered my first Dereelight last week - the CL1H V4. Very excited to get it. While on the website, I was also interested in the battery extension tube that can accept 2 x 18650 or 4 x RCR-123. Does anyone have one of these? I want to get some feedback on it and see what the setup looks like. Can anyone post some pics? Also, how are you V4 owners out there satisfied with your lights?