I had some experience of GS/ CG. -Messing around in uncles's repair shop during school holiday years ago.
#1 rule Riding chinese -Don't pour too much hard earned money on it. If it looks better than the usual one, chav will nicked it.
Something like this : http://www.ebay.co.uk/itm/Lextek-Stu...item58b34d929b is enough. taobao is cheaper.