To define a cut line in laser engraving software you have to set it at a specific color at a specific stroke weight.  For a Trotec laser, the weight is 0.0036pt.   The problem is, if you type in a decimal more than two places the Affinity software rounds it down to zero.   This is a showstopper bug that makes the software unsuitable for the production of laser engraved artwork.  Please fix this.     Thanks.