I picked up this Linhof tripod off my local classifieds for twenty bucks. I absolutely love it. I wonder if any Linhof buffs can provide any background on this thing? (i.e. age, model, etc.) The ball head looks similar to the current Profi-II. As you can see in the pictures, the legs have u-shaped construction with a single leg extension. I think it is aluminum - pretty light actually. The center column can be raised. Also, it could use a light overhaul. Any tips on cleaning the ball head and legs? Thanks for any comments.