I just acquired it and have been reading about the transistors on these units. So far I have de-oxed the pots, cleaned the relays and heads. I probably should have left good enough alone but did tweak the playback head alignment. I didn't pay much for the deck and got it from the original owner. The heads look good and I have cleaned them with 99% denatured alcohol. The deck is in very good condition but I am sure needs an overhaul as it sat for 10+ years. Looking for some good direction in getting it restored.