Thanks I will take you up on that once I get my first attempt working. So far Inkscape is winning :-).
I'm starting with something dead simple, a 5V to 9V DC-DC converter with only 4 pins in a 600 mil
24 pin package. So far even getting the to work is being hard in the sense that there are spare pins that I thought I had deleted in Inkscape appearing in the parts editor and as has happened to me before, something I'm doing or not doing is causing alignment problemsi between where the pins appear on the grid in Inkscape and the parts editor (where they aren't on the grid). Once I get somewhat stable on parts creation I'm interested in the various tristate buffers (74x125/126 74x365/367 and 74x541 where x is 74hc and 74ahc) primarily for level translation between 5V and 3.3V systems. While I'd like to be able to create parts as you are, I think I'm a long way from knowing how to do that and if you beat me to it I certainly won't be unhappy 
Peter Van Epp