Rick's Flags are great ...
I've got 5 of them. 3 of the regular ones and 2 of the larger ones for my farthest flags at 200 yards. They're the only flags I've ever owned but I did a lot of research before I bought them. I also purchased 5 of the sail tails Rick recommended. Initially I used surveyor's tape but find the tails reveal more meaningful movement. In addition, Rick is a nice guy to deal with, willing to provide help in their use, and you get an excellent product for a good price. Others who have seen them in use here in Austin asked where I got them and purchased some for their use. A few, who have made their own in the past, purchased them for the same reason you did. Rick also provided 2 rectangular pieces of wood with holes drilled in them just large enough so the flags's bases would sit inside a large plastic storage box once they were attached to the bottom of the container. Really makes them easy to transport. I've attached a picture showing a container with flags.