Hello Eric, if you are still out there.
Bi-lateral breathing is coming along, slow but sure. I have been working on balance and control through skate and whole stroke, both sides, but more focus on my left armpit (weak side). Today was a good day, bi-lateral on my first 50M felt good (well much better), the next 50M a little more submerged and had to reach for breath a little more on my weak side. But overall it is progress. I then reverted to strong side breathing to get in my laps, then went back to SG and skate drills with more whole stroke mixed in. More work to do, thanks again for your assistance, I am happy with the progress.