The mod works perfectly. The travesty is that a mod is required at all since the Plus and Pro are mostly the same device as far as controlling a drone is concerned, just different hardware specs. But DJI being DJI artificially makes them not compatible. The mod just removes that nonsense.
I massively prefer the Plus to the Pro controller. Much bigger and brighter screen, better battery life, weather proof, I like the sticks on the side of the screen as opposed to on top, the aux battery will be nice when using a USB C screen, it has better ports, much better build quality, and in my opinion better form factor. I prefer everything about it. Same price as the Pro too if buying on eBay. To me it feels to the Pro controller as the Pro controller feels to the RC. But to each their own of course.
Thanks for the info on the battery.