I just took the plunge and built in the PKE Enhanced kit from Dave.
It wasn’t such a chore I think. 
Seriously I was a bit frightened to kill my Matty
but spending the afternoon with soldering was great fun.
The instruction video was more than clear and the outcome is amazing!!
Here is a quick demo video
https://www.youtube.com/watch?v=UhUqXO9UYCU
Where can you get this conversion kit?
If you have Facebook then contact Dave An
He makes them, but only randomly. You can add yourself to the list.
The guy is an absolute mad scientist and… yeah, gutting Matty PKEs to add this is nerve racking, but SO WORTH IT. I have one of the original kits in my personal PKE and refit two of my friends’ meters with the updated 2.0 model!
Did you get that kit recently? I was following the PKEnhanced Facebook page waiting on updates on a new run, but the page seems to have vanished.
Oh no, it was YEARS ago. I think he only made 3 runs? I got in on the first run for myself and the second for 3 of my friends… and the 3rd run was EXTREMELY limited… not that the first two runs were all that extensive.
I bought the kit from a guy who had it lay around for years. He never had the guts to do the conversion. 
Not sure Dave will make another run. He’s busy doing a kit for GB3 goggles.
So lucky, I was never able to get one of these. I would really love to if someone has one laying around.
I’d love just a simple sound mod for the Matty PKE. I look every now and then but I somehow missed Dave’s kits! If anyone out there has one and isn’t planning on getting around to it… Let me know