I did not realise the dimensions are on the BSA sheets and are 1.5 to 0.5 thou. I don,t like the 0.5 that sounds a bit tight to me so I think that 1.5 to 1.7 sounds good. I have taken out the old bush and it,s a two piece bush. Has a steel casing with and bronze liner. I talked to C and D Autos this morning and they say they don,t like those as the bronze centre has been known to turn and block the oil holes. I had not thought of that.