I have rebuilt an AKAI GX-365 tape deck. The audio now works as expected. I need to align the playback head in both the forward and reverse directions. I have an MRL 7.5 ips alignment tape and the AKAI service manual. The AKAI uses a single playback head that is solenoid shifted in a vertical direction to play either the 1&3 or 2&4 tracks of the tape. Unfortunately, an inexperienced person has misaligned the head and the service manual does not follow the MRL alignment procedure. I can align in the forward direction but the reverse azimuth and signal level shows from 6 to 10 dB misalignment. What is a procedure I can use to align the head so that the difference between forward and reverse signal level is about 1.5 dB?