BoYo, you have a great question. This is something I wrestled with when I installed mine. I came to the conclusion that it was impossible to get the proper angle for support and still open the lids all the way. You can open them about 1/3 of the way to slide something or out. The thing I learned is that pulling the pin on the support to release it is no big deal and really the only way your going to be able the open the lids all the way. One of the things you might consider is to put a 2 by 2 by 1/2" aluminum block on top of the deck to help spreed the load which is considerable while pulling tubes and large skiers. I also put a large heavy duty washer on the underside.