It's much easier than you would think as dirtygc points out. Much of the "Minor" time is often taken up with mods or rectifying Lims/ADFs. Simply re-jig your accounting to show that the maintenance only takes, say, 70% of the period, and announce it as a 30% saving!
Also, get rid of OC Eng, and bring in OC Fwd who can't Extend/Defer work to the Minor as it is outside his scope of responsibilty (now belonging to OC Depth). Results in more work at 1st line (old speak I know) but has anyone seen limits on SEngO's overtime budget?
N Joe