I hope you wouldn't mind a personal question Dan, Its very relevant to what were talking about here....How Old Are You?
part of the interest here is how our older out of shape bodies don't fit on the charts like they used to and putting ourselves into deco. or even WXYZ on the rec. tables is not a practical risk anymore. Nitrox helps widen the margin.
I paid 100 us this week for 10 bottles of 32% for peace of mind as I'm pushing the envelope, busy as heck servicing the tourist rush and getting close to 60 years old.

White Sands Dive Shop
https://whitesandsdiveshop.com/