This is true, neither Whirly nor I fit any standard aviation model.
I confess, I'm very glad that I took the decision early in my flying career to buy a good quality commercial logbook - I'd hate to think how many PPL logbooks I'd have got through by now. That said, I do keep a small PPL logbook in my flight bag, which is scruffy and expendable - my main logbook lives safely at home.
G