I can't figure it out (and sadly, I do not have a video). I have a decent (30s+) parallette L-sit, and can do a decent ring l-sit (never timed it).
However, once I move to the floor, I can't seem to get enough clearance to hold an L correctly. Interestingly, If I press myself up and keep my heels on the ground, I get a lot more clearance than if I press up into a tuck-L. So it sounds like pressing/scapular strength is the issue here.
How do I fix this? Any cues or assistance work you guys know of? Would doing support shrugs help?