I'm looking for advice on the creation of library parts. A problem that I have is placing a revolved cut hole feature, a stepped recess for a hydraulic catridge. Two issues that I wish to resolve are: The ability to place the feature on a plane or face and have it cut into the solid (it sometimes cuts the air above the solid surface). The ability to have the sketch orientate parallel to a chosen plane so that the dimensions can later be imported into a drawing at a known cross section (good houskeeping but seems hard to achieve, the same problem exists with the hole wizard drawing sketches) Thanks in advance