Save yourself a boatload of frustration and use Aeroquip EZ Clip.
I put a Mark IV in our wagon and after the third crimp started spewing I gave up and I had use of the genuine crimping tool.
I lucked on to an EZ Clip hose kit for $100 that was missing a couple of fittings. Now I just need to be home long enough install it.
For the short time the fittings held I found that the Mark IV will freeze you out tho.
E-Z Clip System for A/C Refrigerant Hoses
I used EZ clips to put my Sanden conversion together!