Looking for guitar sounds on the Boss BR

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Comments:
: Hi, I wonder if anyone can help. I use a Boss BR 8 to record stuff and I was wondering if anyone knows some good ways of tweaking the effects to give me some good guitar sounds, or perhaps knows any forums or websites on the BR8 for this sort of thing? I keep trying to get a good metal-sound but it's driving me nuts not being able to. The presets aren't good enough.