Having two bodies doesn't always help. Neither one of my Ricoh Singlex II bodies works; one has a screw loose (literally, it fell out after jamming in the advance gears) and fires on advance instead of when the release is pressed; the other has a very, very slow first blade and will only actually open the shutter after a bit over 1 second in B.

Someday, I'll open them up and fix 'em; I could buy two more (without knowing they'd work) for what it'd cost to get one fixed professionally. Meantime, my Spotmatic (same lens mount) keeps plugging away; the meter recently died, but the all-mechanical body is just fine, despite 24 years (that I've had it, plus up to 14 before that) without servicing...