Personally I wouldn't be interested, other's may be. However, your design...If hanging two or more calls from one area. Best, to have them "dangle" @ different cord lengths. Otherwise, they'll clank together.
I did some calling a couple Winters ago. Two calls hung from my neck. Later that day I seen a pr of bedded coyotes. I stalked in, then when I was getting close, I bent over to crawl up on them. Both calls "clanked" together as I stooped forward, to crawl closer. Both coyotes dead ahead a 100yrds or so. They both heard the clank & bolted.