Create your own zones on TP. Don’t use their calcs. Set top of Z2 at 138. Top of Z1 at 125. Top of Z3 at 153. Z4 is any extended (>2-3min) time above 153. Z5 is just as hard as you can go for 30-45 sec and no HR needed. You’ll do very little of that while touring.
Hope that helps,