Did you get a test fit jacket from Wade and Carrie? If so, that removes most of the worry from getting a good fit.
I got a Sheene through them several months ago, and it is my favorite leather jacket when the temps are above freezing. Below that, and if I go with leather, it will be the Thunder Bay.
The Sheene is an outstanding jacket, and you will be very happy with it. P2P on your Sheene will be 24", which will give a very fitted look on a size 44 chest. PC.
I did not get the fit jacket (against Thurston's recommendation) because I had "just" tried on pawineguy's 42 Cafe Racer. I felt like it served as my fit jacket. Thank you for the PTP measurement. I assume you know because yours is a 44, too? 24 will work perfectly for me. The jacket that I measure against, and that fit me best, was 23.5. That is close enough for me! I want to be able to layer at least a tiny bit.