AR-15?
When you guys speak of "AR" grips or "AR-15" grips are you talking about an AR-15 rifle grip?
One Mod I'd like to make is to take a standard 3-lever system and move the mixture control from the top like the other two, to the bottom.
In other words instead of going from say the 10 o'clock position, through 12 and stop at 2 (as seen from the side) , I'd like to have it at the 9 or 8 o'clock position for idle cutoff, and move it down and forward through 7, 6 5 to the 4 o'clock position to full rich. Like the P-51 quadrant. This would un-clutter the top of the quadrant. Not that it's a huge problem, but it would be an improvement.
But to do that, you have to more the whole quadrant inboard and up. I don't know what the extra mild cable bend and length of the cables would do to control response.