Please, take my statements as general. I should back peddle from that statement and will because some people who pull models, then do the graphics right make some really good stuff. I think if you can do CAD though, it is better to work with the model in the "Perspective view port and create your own lines and surfaces. I am always willing to help out on parts. To be honest, I'd rather help someone by designing, or helping them design parts, than make a whole model myself. It may be from being a machinist for almost 20 years, and being used to making parts, not the "whole" thing. So, if i can help, let me know. I can easily pull a "wireframe" from a "Mesh" which will allow you to make and chose how to put together anything you wish. The wire frame becomes lines by which you can work with, snapping to midpoints, tangency's, end points, which sometimes, while being able to do with meshes, the whole meshes are too complicated, so this way, you can break them down and then put them back together into something that unfolds. The trick to this is making points that you know are where the meshes go back together. I work exclusively with meshes, and if I cannot find one, I make my own. Glad to help, if I can. I don't do well on tiny teeny models though. Too many tradeoffs. there are some on this forum like
Linsweregon, who are masters at this, gotta mention
Spaceagent9 too.