If you somehow manage to get your promised 42 days leave each year, you do 1 day SEP, 1 day CRM, 2 days RTGS, 4 days sim which totals 50 days a year. That leaves 315 days for work, which is a little over 10 months. So, if you are doing 900 hours a year, then you are doing just under 90 hours a month. As stated.
Then there is the issue of moving goal posts regarding leave bidding; late release of initial bid and unsuccessful secondary bids, plus lack of roster satisfaction, and the picture is a little less rosy.
I can attest to the abuse of the leave system which uses short, unasked for leave periods to use up owed leave, while still getting a more than productive month. These leave periods, also often preceded or followed by ULRs, to further put a kink in the system.
What's not to love?