On my original, I did not use tape on the mip/fip connection. There was tape on the compression fitting.
Mine does not have stripped threads. Didn't have to jam it on. Just hand tight and no leaks.
Not sure if the manufacturing of the sprayer has changed? Never had a problem with mine
I built this system today with NO problems. The threads didn't fit right until I put about 8-10 layers of teflon tape on the male piece of the flow master. Before that, it did not fit correctly. However, after I put the tape on, everything screwed together perfectly and there were no leaks! Thanks OP!