The allure of radar bullet chronographs is just too strong to resist. The sheer number of modifications and/or add on's to make these expensive gadgets work is simply amazing to me, and a true testament to American ingenuity and determination.
What ticks me off somewhat is that the Canadian manufacturers of the device don't do more of this R&D to make the things work better. I find that the build quality with regard to blast sensitivity varies widely. The first one I had was one of the early models that worked almost flawlessly. That one got stolen so I promptly replaced it. The second one was a dog and just wouldn't trigger very well. I sent it back to LabRadar and they jacked up the internal microphone and now it works well most of the time. I don't use muzzle brakes so I can't comment on how they affect the unit, but with non-braked rifles I find that after following the instruction manual, the two most critical factors for reliable shot detection are triggering and proper aiming. The MK Machining sight helped aiming the device a lot and is a very clean setup
https://www.mkmachining.com/product/improved-labradar-sight/. I tried one of the cheaper knock off inertia triggers
https://jklprecision.com/product/labradar-trigger/ that didn't work at all. Might have been a lemon. I just ordered one of the original (?) Piet recoil triggers
https://pietrecoiltrigger.com/shop/ols/products/orange-recoil-trigger-2021-rng-rcl-trg-2021for my suppressed weapons and will report back on how well it works. I will agree that the LabRadar doppler chronograph was a game changer, if not somewhat finicky to get the best out of it.