mrspeakers,
I will speak for myself. I believe you yourself said that you would be investigating how to modify your RP2 design to work with both 840 pads as well as stock. I guess your post means you have changed your mind about that. No problem. I did your mod on one set of phones to use as a starting point. In other words, I picked up some 840 pads and was going to play around with your mod to tune it for stock pads and / or 840 pads, or if you had posted changes, I might have tried those.
So, for me anyhow, that was the motivation.
I agree that your mod sounds dreadful with the stock pads!
Although, as I stated in a past post, the low end sounds pretty good... the rest of it stinks though.