Evolution quiver sizing?

Thanks for the share. Sounds like the 155 covers a huge range. Why would you still want a bigger wing for prone?
I have an extra 20kg to carry and use P170 only when it’s 1-3ft. Was considering replacing it with the 155 and keeping my P140 and E115. But it sounds like 155 + 115 could be all i need? Prone only. 95kg.