I used a course grit block from a hardware shop, cost about a fiver. Takes quite a while to get it down. But if I were you, I'd PM Stallionlegs and see what he's got first.
@Sharkstar started
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I used a course grit block from a hardware shop, cost about a fiver. Takes quite a while to get it down. But if I were you, I'd PM Stallionlegs and see what he's got first.