Yep well aware of the 900 hours being from park brake off until park brake on. But at the sort of hours guys are doing then this must become a factor soon. Oh and even if you did only 2 man crew, 90 / 1.14 gives you just under 79 per month, and over 12 months, that is 947 block hours. Do a few 3 man and 4 man crew flights, and that block to block time is into the mid eighties.