Michael Rogers said: We use the Kirby markers from 50 to 200 on par 4´s and 250 for par 5´s. They have been in a couple of years with no issues, no news is good news.
Michael Rogers
Marbella Golf Country Club
Twenty two years ago while building a new golf course I called Kirby about markers. They quoted me two per distance for both sides of fairway, essentially two x 100, 2 x 150, and 2 x 200, and maybe 2 x 250, I don't remember. I told them we could afford about half that, so "can I just get one for each yardage and I'll put them right down the middle?"
"Nope. It's a "system." They won't work unless you have them down both sides of the fairway."
"You're kidding, right?"
"Nope. Down both sides, or you dont get any."
"Well then, I'll take none."
Plenty of times since then while playing or visiting golf courses, I've seen one down the middle.
I'm glad I didn't buy them.