Dom, been following this stuff as well. Diamond Kinetics is another one mentioned frequently, which you may have mentioned in a previous post. It's all interesting but with 2018 preparing for opening season I have to keep the talking about this stuff quiet. On their twitter feed they reference a lot of things, but on their web site it's more sales site for their Swingtracker, similar Zepp but with improvements.
https://twitter.com/DiamondKinetics