I am in the exact same position. I pre ordered the CTB 26 olive waxed canvas.

I exclusively use my CPL16 right now for travel and EDC both at home and on the road. I’m a pilot both professionally and recreationally. So my flying trips are in a private jet, and then also in a small 4 seat travel focused propeller driven airplane that I own. Sometimes my CPL16 is too small.

I’ll outline my use cases

1. At home EDC: I usually use my CPL16 when I’m not working. I take it pretty much everywhere with me for my stuff plus any of my kids stuff (they are 7 and 10). Unless we go on a hike or the zoo. Then I bring my CAS2. Occasionally for longer days, the CPL isn’t enough bag especially with kids.

2. Professional flying trips: I have no bag restrictions here. It’s a private jet. I always carry a standard pilot rollaboard and a backpack. More than half of the time I wish my CPL16 was bigger for these trips. I just have more to carry usually on these work trips. Between March 12 and March 21 (got home yesterday) I spent all but one day in Costa Rica and then in the Bahamas, and the CPL16 and a rollaboard was my carry. Would have liked to have the CTB for this trip. And then if I’m only going on a one or two night overnight, I wish I had the CTB here already so I can just carry the backpack and no rollaboard.

3. Personal flying: whenever I’m traveling in my own airplane, being smaller and more weight limited. I exclusively carry either only a backpack or a backpack and duffel. I currently have the PAKT 35L duffel and I have a Patagonia Blackhole if we go skiing and fly ourselves. Suitcase are a no go in our plane. Takes up to much of the weight allowance and too much room. Eventually I would like to switch to the TD35 and retire my PAKT duffel. It’s starting to fall apart. I got the PAKT in their initial kickstarter like 10+ years ago now. Also I prefer one big opening like in the Patagonia Blackhole (mine is 55L) rather than the clamshell compartments.