I never tried it, but I do not shoot much roll film. I use tray syphon only
to wash RC color prints of 8x10 size in 11x14 tray.

I use Jobo 2500 size reels in two of their tanks. These reels can do 120 and
220 size film as well, though I use them mostly for 35 mm rolls and 4x5
sheets. I have seen their film washer gizmo. But I just stick a flexible
hose down the center of the reels and let the water run for 10 minutes.
After 5 minutes, I dump the water and let it refill. Then at 9 minutes, I do
it again. Then I hypo clear for a minute and then photo-flo for a minute.

The advantage of the Jobo gizmo that I do not use is that it mixes air
bubbles with the water. I am not sure what good that does. Some people do
that with their print washers too. In the winter, it might be an advantage
if it lets the dissolved air in the water come out of solution instead of
forming on the surfaces of the prints. In print washers, the water flow is
much less than when washing film, and this happens, especially if you are
mixing cold and hot water to get the mixture at the temperature you want.
But with film, I have never had a problem with this.

   The tray syphon works fine for sheet film but you must
make sure the sheets don't stick together in the tray just
as you would when washing prints.
   For roll film I stick the end of a hose into the center
of the tank. The JOBO system sounds about like this but I am
not familiar with it.

No.

Use hypo-clear and wash in the tank.

I don't think so. The tray siphon is designed to maintain a water flow
from the bottom (where the hypo sits) in a flat tray. IMHO a much better
way would be to leave the film in the tank and have the water flow in from
the center, pushing the hypo up and out.

If you wanted to get technical, you could rig up a hose from the faucet
into the spindle, less technical, use a funnel, really simple aim the
water into it.

Geoff.