Split Elevon Air Brake Testing on Flying Wing

I wanted to see if I could use a split elevon and some serious mixing to use a split elevon as an airbrake for my flying wing.

Worked great! I'm planning on using something similar on my larger, heavier Raptor 140B and new Raptor 140C. These two airplanes are much heavier and suffer from a very long glide ratio and high speed stall, meaning a very long approach.

Have you tried this before? Anything I could to make it better?

Thanks!