Huss
Veteran
You should try pairing your FE with a Series E 50 or 35 next time. That will lighten your load and you won't be giving up much on the lens side of things either.
The Nikon 45mm 2.8 pancake is their tiniest lens. Next would be the Voigtlander 40mm f2 pancake. Which actually is a 'better' lens than the Nikon (I have both).