Hi Robert, Here are some pics of the mount that I use. It is mounted to the top of the engine where the crankshaft seal mounts, the accelerometer is central and the inductive pickup is to the side. Take your time and good luck it is very sensitive and reaching for perfection can be frustrating but once you get the hang of it you will get results quicker. I use stick on wheel weights on the spinner flange edge where the screws go in and as a guide I have found that 3 grams will give you about .1 ips correction. If after your first measurement you are getting near 1 ips take your prop off and check for static balance first as the closer you can have everything statically balanced it makes it easier to dynamically balance.
Brian