I have one!
I have MDX pulsing every tenth of a mile based on speed and the 65ms logic timer. With a virtual brain, I set the speed to 60 MPH and took my recliner for a 150 mile trip. Played with RR, surfed the web, listened to some music. There were deviations, but never got over a 0.1 out of sync. Seemed to want to correct itself when things calmed down. At the end of my trip it hit the correct tenth of a mile 3 seconds early.
The pulses are being received by ENM's T45A2 LCD module. 10 year memory, 2nd re-settable trip channel, back light. Hooked the whole mess up in the car tonight and drove half a mile on my jack stands.
P.S. Second FB is in handling photo sensor, inside temp, check engine, security, high beams, turn signals, alternator, brake, low oil and skip shift. Dual screen with RR is working. I have inside and outside FB temps displaying in RR through COMs. Ready for third brain as soon as I decide PWM or relays for my blower fan.