Flipbooks by speed?

I’ve got this problem. The character player, (and other sprite based actors), will have a speed they can work up to. For this reason, I’ve been trying to get at least 2 forward animations, based on speed. One that is less than 0.5, (for walking), and one that is greater than 0.5, (for running).

I’ve tried various combinations of velocity Blueprints, but can’t seem to get it to swap based on speed. If you have tried this, or know what to do in this situation, please be my hero, and let me know.

I have other sprite based questions on my profile, and if you could help with any of those, I would be truly grateful.
Thank you for your time.