Yes, there are trade offs in going with a quadrant vs stock cable controls.
Per the quadrant example pictured in post#4:
I honestly can't remember how I was able to squeeze under that panel to do all the systems & wiring & such, I was younger and had the ability to twist myself like a pretzel I guess, but did it never the less (sure couldn't do that today!)
The owner did request the throttle lever knobs be about the same vertical height as stock cable knobs would be, therefore the quadrant was mounted about 2" below the main instrument panel. He wanted the lever knobs to be at a comfortable height, not feel like he was reaching upwards all the time.
The owner was at least 6'1". He was able to stretch out his right leg to the side a bit, evidenced by the paint scratches to the center floor cover plate by his heal.