Hey DG, I know it has been awhile since redi cube has been at it's peak popularity but I average sub 15 and have multiple sub 10 singles using the Yuxin magnetic one. I made a video of it if you want to see it https://www.youtube.com/watch?v=RBHGsg2xEmU&t=12s
This is a little late, but I just wanted to congratulate you (@DGCubes ) again on being the 2018 US Nationals Pyraminx Champion. You really deserved it and I was happy to see that practice and patience paid off for you. Well done again!