comments:
Inferring that your "old tripod with the simple screw mount" is one with a standard 1/4"-20 UNC bolt since you "don't want to take your capture clip base off the camera", which implies your camera would work on your old tripod if you took the capture plate off. If this is the case, you'll want a simple Arca-swiss compatible quick release clamp to mount onto that screw on your existing tripod, which will allow it to clamp onto your capture clip base. I keep one like this one in my camera bag on the rare instances I need to use it on someone else's gorillapod or suction cup mount or something, but doing a search for "arca swiss clamp" on google or amazon should bring up multiple viable options depending on features you're looking for. As for Peak Design's own tripods (Both Travel and Pro), they are 100% compatible with the Standard Plate that you're already using, and in fact come with a Capture-compatible Standard Plate of their own in the box just in case you didn't already have one.