Hi Jilly,
I have on the WB 122 an removable compression post. When sailing it is in place, when asleep, it is removed.
I think a compression post is necessary because the deck is too weak to withstand the compression when sailing and too weak to hold the weight of persons walking on deck. Without compression post, and standing/walking on the deck, you can see that there is movement. And this movements leads to cracks.
greetings,
Barend