Tear down and rebuild an engine? Can do -- mind, I do have to send it out for the machining. Still. Heck, even semi-successfully rebuilt an automatic (AW4/A340E) gearbox with the wife, but we ended up paying a shop to do it over 'cause we got a few things not quite perfect. Still, ran and went through over half the gears including reverse successfully which is more'n most first time and without the proper jigs folks can manage with an automatic rebuild.
Electrical, too. Plus drivability diagnosis, and while no certifications I've learned my way around automotive AC well enough to be dangerous.
So yeah, feel free to ping me for general mechanical advice or more specialized stuff. If anyone's seen Wangan Midnight, serious life goal to be Iketani but female. =D