I hold a Master 1600 O/C and I’m having to and I’ll say this “re-take” the test for 3RD MATE I’m testing at the end of the month. There are like almost nothing differant about the tests this whole system is bull!@#$ if their is a differance then why not test on those items only. Just go from 1600 MATE to 3RD MATE with no test and from 3RD MATE to 1600 Master with a 70 question exam. The only people that loose here are the Master 1600.