You would think, but I used the VintageAir hose kit and borrowed the correct tool for that system and used it per the instructions which IIRC was to tighten until it bottomed out. It's been quite a few years now but I think it was Gates hose and fittings. I then recrimped them with a different tool that allowed you to squeeze them tighter and still no good. I'm aware that if I somehow messed up the first time, recrimping might not fix the problem.
Once I discovered the Aeroquip EZ, it was so long crimp fittings. I've used it on my big truck too. As quick as you can squeeze the pliers, you're done. Literally click click.
Kevin
If it was the manual screw down version my original Mastercool unit had two red lines scribed 1/8" above to completely closed position. The instructions at the time said to stop at the red lines. I just checked their website and the instructions are the same. I am not sure how one is supposed to determine what step 8 means
Also had a Vintage air install where the lines leaked a small amount (Lost charge over winter). When I called their tech line the said they had some issues with fittings and to over crimp the leakers. leaks gone
