We do not build a 3500SS.
So you either mean a 3050S (which is a full wall slide, living room and bedroom) Which is a Schwintec.
OR, you mean 3100SS which is a super slide (sofa and dinette) no bedroom slide. that one has a Lippert Above floor slide.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).