There is an adjust for fine tuning but I hardly use it. It maybe useful when tuning for distant or weak stations.
After recapping the PSU filters, I changed some of the poly(s) with Wima(s). There were minor improvements, most noticable are the headroom improvement and clearity of the reproduction.
Please note I did not perform any additional changes on my 1st FM3 (soon to came), except to replace the 3 electrolytic caps. My 1st FM3 has gold-plated pins on the MPX IC whilst the 2nd does not.