It’s great to have your own signature dropouts but the main reason Paragon is so great is they are a great price for what it is and they will support things into the future, like hangers and axles. Not to say things won’t get phased out but they won’t just suddenly disappear and will give us time to prepare.
If you’re sure the Cannondale or UDH hanger is going to be around in 5 or so years… have at it! But even though the PMW flat mounts are not a stunning work of art there is a non stainless paragon that is $63 plus $23 for the hanger unless you go stainless or Ti, so not too bad.
There’s a reason many bigger custom builders use hooded with the 5/8” bosses, but the process has to be so dialed especially in Ti when welding causes so much distortion they’re hard to keep “flat”. It’s so much easier and faster to use the Paragons and wait for the next “standard” that will hopefully be nicer to build with and look better too! 