I am installing two Panasonic bath exhaust fans - one FV-08VQ3 and one
FV-11VQ3.

Because of the difference in size and location of the new fan, I have to
extend the existing 4" sheet metal conduit to the new fan. They are about
30" apart. Should I use new sheet metal conduit to bridge this 30" or
should I use a "coiled" looking flex conduit? or PVC pipes?

I need to cut the existing sheet metal pipe back a bit, what is the best way
to do this? The attic space is tight I am pretty much limited to hand
tools.

Also, I traced the conduit and found that all the bath exhaust conduit do
not exit the roof, but simply extended to the roof overhang and sat on top
of soffit openings. Is that ok? When the fan is on and moist air is drawn,
part of it will exit the soffit vent, but part of it will go inside the
attic. Is this acceptable?

Thanks,

MC