What sort of distance are you hoping to use this over Gary? I've got the 088 and according to the spec it is accurate to+/- 0.3mm per metre. That detector says it can be used up to 50m but does that mean it could potentially be 15mm out? Maybe I'm missing something? I'm interested in this as I've recently been looking at rotary lasers for setting out big jobs but want something that is as accurate as possible over this sort of distance