I have decided I am going to take on the restoration of my recently acquired Pioneer SX-737. This unit does not appear to have seen much use at all and I even have the original packing and box. Almost like it came out of a time capsule. Pictures: https://imgur.com/a/2yCpNWV The unit is sounding great, but I really want to get these old electrolytic caps out and replace with new to avoid trouble. Electronics are not new to me and I do have experience working with electricity on both standard household and industrial 3 phase circuits, but nothing quite like this. I do have some pretty decent tools for the job. Hakko 936, MG Chemicals 60/40, SRA Rosin Paste Flux, solder sucker, braid, 170 cutters, Pomona mini-grabbers for the multi-meter, surgeon's hands (welder joke) , etc. So I am off to a pretty decent start, but by no means an electrician or double E. So here are my questions. I have gone through many older threads on this very topic and have made a BOM (largely from Mark the Fixer's) for the components I will use in this preventative service and there are a few components that I am not going to be able to source. Any changes I am making to Mark the Fixer's BOM are marked in yellow waiting for approval from more qualified people than I; additionally there are some that are marked in red that I simply am lost on what would be a good substitute. Most of them are those film caps found on the tuner board and others. Also, mouser is out of 512-KSA1220AYS should I just wait til they arrive? I will be installing 863-1N4004RLG as my unit does not appear to have it between pins 9 and 10 on protection board banded side to 10, right? Is it normal to hear some crosstalk (terminology?) or bleed from the FM radio on the recording functions? Any recommendations on replacement main filter caps? My original caps are ELNA CE-W 50v 6800μF 85C capacitors. I am still searching for an appropriate replacement for those. Lastly, should really replace all these transistors? Not that it is a big deal, but do they really need it? Do they degrade like electrolytic capacitors do over time, or is it with use? What say ye?