I use an old version of SketchUp (7.0.10247) while Google still owned it and gave it out free. That is the last one that still supported import/export DXF files which are common on the Internet. I only use a couple plug-ins... Loft, STL export for 3D printing and Bezier Curves. Haven't used the Trimble versions of SketchUp except trying to teach a class with the on-line version. Waste of time! I've used many others including AutoCAD, Fusion 360, Catia, Patran, and others professionally. SketchUp is the easiest to learn AND MAINLY to use casually. Fusion 360 is far more powerful, but I feel it is something you need to use nearly daily/weekly to keep proficient. SketchUp is intuitive/obvious like a paint program. You can put it down for six months and pick it right back up. I couldn't with Fusion 360. Had to go back through the tedious, but very good quality tutorials.
An example considering your O.P. This took three days (off and on) but with at least two complete re-start from scratch iterations, but also included the print time of intermediate parts which caused me to go back and make further enhancements. The plane mods are fully CAD'd up and printed. I haven't assembled the full F-22 as I'm not capable of flying it... yet. Working on that.
https://forum.flitetest.com/index.php?threads/hybrid-mini-f-22-raptor.71083/
Edit: I should note, I don't make plans... I take 3 view sketches, plans, blueprints, photos from the Internet and make 3D models (not 2D plans). YMMV.