I need to stick a pick-up on my acoustic for a gig next month. i need something that is non-permanent ( a sound hole pick-up maybe?) cos i don't want to cut or screw anything into my guitar, and doesn't sound completely crap. and of course something reasonably cheap. up to £50 or so. I've seen the Seymour Duncan Woody range - any good? and also the ultra cheap Belcat range (probably as shit as they are cheap, but you never know these days).