Finally! I found it. After trying a few different follow focus gadgets, I discovered one that works perfectly, is built solid, and costs a fraction of most commonly known brands. You can easily spend over $1,000 on a focus system and still don’t really get what you’re looking for. Enter Houston, TX based company KAMERAR. Their FF-3 Follow Focus mounts to standard 15mm rods which makes it easy to slide, adjust or remove. The main gear can be switched from right hand to left hand operation. Since the unit is mostly made of metal, it adds a little weight to you camera, but you will appreciate to solid feel and operation. It also includes a removable dry-erase marking disc for your focus points. Find it at KAMERAR for $155!