I know it has an external rebound adjustment. But what is the internal preload adjustment. I have the manual in front of me and I could not find anywhere how or where to adjust this setting. I'm wondering this because I think the fork feels a little soft. Where can I find info on how to adjust this setting and also how to change to a heavier spring. Is there some other manual out there that explains routine Maintenance and adjustments.The manual I have explains a lot of the air adjustments on other models but nothing for the standard argyle.