My nephew Max is in town for a couple of days to get some good plane work done. After his review of the AC installation, We got to work on crimping some of the hoses. Started with the ones in the tunnel. Used a hydraulic crimper I got from Amazon that seems pretty legit. First crimp came out good and then moved on to the smaller hose. That crimp looked ok, but definitely not as good as the first. Did another end and it didn't even crimp at all, hose came right out. Was this Amazon crimper junk? Finally realized it was user error. 8mm does not mean #8 die. 8mm hose is actuall #6 hose, and 10 mm hose is #8. Got the correct #6 die in place and recrimped - good crimp. Proceeded to get all the hose ends except the firewall, I'll wait on those. Pulled the caps and loosely installed hoses ends on the evaporator and the condenser. Installed the grommets in the bottom of the plane for the condenser penetrations. It is tough to balance the grommet between hose size and ability to install. They're a little loose around the pipe. Max suggested the pros would fill the gaps with proseal.