-18 actuator is there such a thing???? i won an actuator on ebay which was said to be a -31 for £16 now the guy is NOW saying that it's not a -31 but a -18 anyone know if you can get a -18 or is he just bullshiting me . He said these where the numbers on it 95-130 H1 29 430099-18 which mean nothing to me anyone on here know if it is a -31 or a -18 if it is an -18 whats the differance and are they anygood he said that it came off a stage 3 cossie.