I have a half a dozen crimpers that I bought from Del City many years ago.
http://www.delcity.net/store/Ratchet!Style-Crimping-Tools/p_10382
If I were the only one using them, I would probably consider a crimper with changeable dies, but the dies would get lost around our shop pretty quickly. For repairing engine harnesses, bulkhead connectors and weatherproof connectors, crimping is the only option and it takes the correct crimper for the type of connector as well as wire gauge. I used crimpers a lot back in the early 90's when I retrofitted trucks that were born with mechanical engines with electronic N14 engines. When you use the proper crimper for the terminal, you don't worry about tension. With the proper ratcheting crimper, you just squeeze as far as it goes and you will have the proper crimp. We always do the "tug test" just to make sure.
