Agree with byoung4now except I don't use teflon tape for the fittings. I prefer blue threadlock.
Aside from the straight cut, you may want to put a bit of lube on the end of your macroline before you stick it in the fitting. It can help to preserve the o-ring within. Air it up slowly the first time to make sure there are no leaks. Replace the macroline if it gets damaged in any way. (It's cheap enough.)