I'm a newbie and have our cruiser for about 18 months and I've been searching for the inside scoop on fixing the Slider window problem which I only just discovered - doh! Looks like I need to purchase the seals from a dealer so that seems ok. Virtually all of the jack parts are toast due to rust. I've already replaced the 4 piece extension set and the jack itself was ceased on account of rust; though I was able to break it free and it seems to work ok. So two questions: (1) For the slider window problem, is a new seal enough or should I plan on buying some kind of sealant? (2) Should I purchase a new OEM jack or get a more specialized heavy duty jack, or rely on the rusty original that seems to work?