5,376 (5,152) Widegate Surprise Major

Donald F Morrison (no. 1721)
234567  M  T  B  F  H
645273        ss s
423657  2* s        -
Repeat five times. 2* = s -.

Contains all 24 each 56s, 65s, 8765s, and 8756s, and 12 each 5678s off the front, 6578s off the front, 8765s off the front and 8756s off the front.
Reduce to 5,152 by omitting ss from the last part (contains 2 fewer 65s, 8756s, and 8756s off the front).
Warning: also contains 120 backstroke 87s (110 in the reduction).
True to all GHIORbcfXYZ.