looking in to new method to capture dual pwm sign

I recently learned from Pommie that many RC receivers use staggered pulses, so I may be able to modify my routine so that it captures several and differentiates between them. The timing does allow for it; the maximum pulse is typically 2.5 ms, and the pulses happen every 30 ms. So I'm working on a plan to use one capture pin for several inputs, I'm adding a connection to another pin, with a diode to isolate that signal, so that i can have the chip check which signal is high just to keep it all calibrated. Here's what I've drawn up for it so far. I added an ICSP connector too.