The Fozgometer measures crosstalk and channel levels through a filter. It's a good start but by no means is the optimum way to set azimuth. Feickert uses the transfer function to measure phase response, to which the ear is much more sensitive. Minimum phase error between channels is often in the ballpark of minimum crosstalk in terms of azimuth angles but rarely coincides.
For far less than $250 you can get someone to do the full Feickert alignment service.
For far less than $250 you can get someone to do the full Feickert alignment service.