I have the macro working but it seems to conflict with Logic Key commands? Every time I hit the keys I assigned Logic just flashes gray (like it does when you hit a key that isn't assigned anything).
It's most definitely conflicting with a Logic key command if it's flashing like that, you should probably check out the Logic's Key Commands window. One good way to test out whether the key commands you've set conflict with Logic's or not is by assigning them to an un-assigned Logic function first just as a test. If there are conflicts you will immediately be alerted with a pop up message.
The other thing you need to keep in mind is that the Inspector on the left must be visible for this to work, it doesn't work with the Region Inspector float window.
Mac mini (late 2012 Server) 2.3 Ghz i7, 16GB RAM Macbook Pro 15" (early 2011) 2.3 Ghz i7~2TB Samsung 860 QVO~16GB Ram~macOS Catalina 10.15.7~Logic Pro 10.6.1~Universal Audio Apollo Twin Duo Thunderbolt MKII~KORG microKEY2 61