Thanks for mentioning the spearing problem. All of my beans go into chisel-plowed corn, which means there are lots of root balls on the surface. If I had to stop once each round to remove root balls I would still be working on beans. Regarding backing up to clear root balls or stalks, experience tells me thats an excellent way to fill the space above skid plates with dirt. How can you avoid thatIJ The first hold down clip on my head next to the wobble box is a Crary. That nylon pad wears through sickle sections much faster than anticipated. I wouldnt like having to replace a sickle because half of them were worn through before the cutting edges wore out. I am still looking for a good replacement for the sickle on my 525 head but havent been able to decide which one to get. Tiger Jaws looks good. Maybe the Gleaner sickle is the one to get. I am still open to anything. Tom in MN