Cover
FT026s   1  3 12 24 27 28 35
FT027b   2  7 20 29
MCK      4  5  6  8  9 10 11 13 14 15 18 19 21 23 25 26 30 31 32 33 34
S3M2NSF 16 17 22

Original
FT025s  29 38
FT026s  10 15 17 22 23 24 27 33
FT027b   1  4  6  9 14 16 20 25 28 31 34 36 37
MCK      3  5  7  8 12 13 18 19 30 32 35
S3M2NSF  2 11 26
NT2     21

        Engine                          Author          Cov / Orig
FT025s  FamiTracker 0.2.5 stable        jsr               0 +  2 =  2
FT026s  FamiTracker 0.2.6 stable        jsr               7 +  8 = 15
FT027b  FamiTracker 0.2.7 WIP           jsr               4 + 13 = 17
MCK     MCK / PMCK / PPMCK              various          21 + 11 = 32
S3M2NSF S3M2NSF                         mukunda           3 +  3 =  6
NT2     NerdTracker 2                   bananmos          0 +  1 =  1
        Total                                            35 + 38 = 73