I am transitioning from carry-ops shooter to open division. I have been shooting with the Sound Gear Instant Fit electronic plugs and they work really good...unless I have to RO an open shooter. When I shoot my new open pistol, I use the Sound Gear plugs with a set of muffs over them. This makes it very pleasant to shoot and I experience no ringing afterwards. Now that the 2020 Race Gun Nationals are over, I have been seeing a lot of video footage and a majority of the shooters and ROs are not wearing muffs. It appears that most folks are wearing custom made in-the-ear plugs. I have done some research through the search field and found lots of info on hearing protection but not sure if the people are actually shooting open guns or not. I would love to hear what the open shooters are using for ear pro so I am more informed before making the large investment into a custom set of plugs. Thanks in advance for any help you guys can offer.