When I bought Alibre, I didn't really do my homework regarding the built-in surfacing tools. I'm now often in a situation where I need to do one of the following, but cannot really do it in Alibre. I realise Alibre is not a preprocessor, but I could do this in my other (yes, more expensive) 3D software in the past. What I'm missing is the following: Split a surface with a sketch (line. circle, polygon, etc): For example, a washer face around a hole so that I can model bolts. Or to apply a force/UDL over a certain region on a face. Create surfaces by extruding sketches: For example, to model thin plates - when meshing in the FEA software I can use shell elements instead of solid elements (which is a bad choice for thin bodies). Extract midplane surface from sheet metal body: Related to point 2 above. I have found a way of doing this by deleting surfaces, but it is a bit crude and time consuming. Any workarounds or other (inexpensive) software I can look at? [Edit: NOT to replace Alibre, but to supplement] Thanks!