Assembly and reassembly is nice, but what about troubleshooting if something goes wrong?
Take a look at the American Gunsmithing Institute (AGI) and see if they have courses available in your field of interests.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)