I certainly agree a 14 x 4 isn't enough prop for the Saito 100 and could probably overspeed the engine. You could use a 15 x 4W with throttle management.
According to the ad in RCU the motor only has had 12 flights on it. Everything appears to be ok. It still has good compression and feels smooth. Would you guys suggest adjusting the valve tolerances after it has been run with this prop or do you think that since it was a short number of flights it will be ok?