Running full length housings from my sd7s to my bb7s. Instructions say to use the conventional (im assuming means open?) for the ends (caliper and lever) and the sealed if I wasn't running a continuous housing and had breaks in the housing ala cable stops. With all the muddy riding here in florida I wanted to use the sealed instead thinking it would help keep more of the dirt/grime out. I had remembered reading somewhere tha using the sealed caused issues with spring back on the bb7s, but I wasn't positive.