I use the Feickert protractor and find it accurate and easy to use. I've never owned the Nasotec tweezers, but they seem like a useful tool. I just use needle nose pliers and and grab the cartridge clips by the solder flange. Seems to work fine.
what are your cartridge set up go to
What alignment tool are you using and has anyone used those forceps style tools that grip the connectors instead of basically squishing it ?