Different ways to finish omoplata?

I know that traditionally you sit up, wrap the far arm or the neck, and lean forward in order to finish the omoplata. I'm wondering though if there's been any successful scientists with finishing variations on the omo. Maybe a type of roll or some grip which helps, anything.

The reason I bring this up is because I'm short. Short arms as well as legs. So naturally I have troubles trying submit bigger people with some techniques. When I'm in jiu claw, even when I'm trying my best to hold them in place with my arm across their back or hips, I pretty much always have to settle for the sweep due to my inability to stop the roll of the guy.

Sweeps are great. I love sweeps. But finishing dudes when I have them in jiu claw would be way better.

Try this:

http://www.youtube.com/watch?v=lHXPeEtTJX4

That looks sweet!

I like use a seatbelt grip to stop them from rolling. So right arm around their neck and left arm under their far armpit and gable grip hands. From here you can also transition to a link choke (hands in an S grip around their neck) and push away with your legs or if they do roll slow the roll and backstep towards their head (once their legs clear) and you will end up in mount and most often in a top triangle position.