I would like advice about replacing my big ring with a bashguard. My current crank is a Truvativ Firex Team '03, and I don't have any experience with bashguards. My main motivation for the change is that I want to better navigate logs (and no teeth marks on my leg would be a plus). My main questions are: Specific brands? Lexan or aluminum? sawtooth pattern or smooth edge? Thanks in advance for your help, I'd love to know what has worked.