mark clip (x) to work when a timeline is opened in source monitor

since as of right now adobe only supports 50 open clips in the source monitor, the best way to go through the footage i shout throughout the day would be to put the clips in a timeline, open it in the source monitor, and use insert and overwrite from there. sadly this workflow is overly complicated, since i can’t set my in/out markers with x like in the timeline window. since jumping between clips is possible with up and downarrow, it seems like some funktionality is already present.

I consider this a key feature in a keyboard only workflow, which most professional editors use. current workaround. go to in → mark in → press downarrow to go to next clips → go one frame back → mark out.

The other way i look through my footage is to open all the clips in the source panel, and cycle through them, picking what i like. sadly also this feature is limited, because i can open a max of 50 clips, making it tedious and errorprone, since there is the danger of missing clips when reselecting a new batch.

Any other good ways to go through footage? I also saw “pancake editing” where you have two timeline panels open and switch between them, but it looked not usable since insert and overwrite don’t work.

Any suggestions welcome.