I saw several at Oshkosh with similar amounts of hardware added for balance
as I did (i.e. AN-3 bolts with washers) inside the backplate. Which sort of
reassured me that I wasn't nuts in adding them. (well at least not alone)
I've been pretty happy with the results.
Likely refinish my prop next season, and look forward to using the DynaVibe
again at that time if it goes around again.
I think the sensor output has some gain, but is probably accurate as you
get lower in vibration. Even if the IPS value is incorrect, it doesn't really
matter as you just tweak for the lowest possible value. Which clearly is a
lot better than not using it.
On the other hand, the tool did find a cracked prop prior to my using it.
Great Tool.