So I picked up a set of these at the dealer last night because I was looking for something that would provide a little protection for the bottom bolsters and also protect the backs of my legs in the middle of the Houston summer ("Hot and Sticky" doesn't even come CLOSE to describing it). I was curious if anyone else has ever used these before? The reason I'm asking is because I have a 135 with sport seats and the dealer told me the seats are identical to the 335 sport seats and these are the vests for the 335. When I put them on, it seems like the back is about 3 or 4 inches too short? When I sit down on it, it pulls the back down so far that the velcro rips loose where it connects under the headrest. I realize they may stretch a little over time but that seems excessive? Anybody have experience with these? Are they really that tight when you first put them on or could I have the wrong seat covers?