Okay replace spin out with “maintain higher than100rpm for 2.5 minutes”. I am a grinder not a spinner so whilst I can go over 100 I can’t maintain it for long but I could easily reduce the rpm and push a slightly bigger gear. 70 to 80 is my comfortable rpm.
Cassette is an 11 28.
iit sounds like overall it is a bad idea, like I thought.
To be honest it is rare I am in the shortest gear, somewhere like blissford which you can push a bigger gear if need be. I don’t like putting too much strain on the drive not that I’ve snapped a chain on the road bike yet, I have on the mountain bike and it hurt a lot hitting the deck. So, sounds like a proper double is the best idea and save the compact chain set for when I go somewhere with proper hills