Filmshooting

l be far more rewarding.

It would also be better to expose clips with variably exposed parts and process these separately with variable timings.
I.e. expose a clip of some 50 centimer, take out the cartridge, cut the film across, in the dark yank/pull out the exposed film (from below),
put the clip ...

The sync block is only needed if you are conforming A&B rolls of negative for printing or have sync sound on mag stock. They are also handy for getting frame accurate counts of your film if you were to send film off for printing. Most people use them these days for door stops or boat anchors, but if ...