Thanks Loco for that spreadsheet. They are pretty close. The TBM would not cost 1k/hr, would it? Not as a DOC. But maintenance would take it past that. One TBM shop I was hangared in for 10+ years would have billed perhaps 50k a year even if you never flew it But Part 91 ops (which reportedly, allegedly, definite rumour has it, nobody does, because everybody is on a programme, to preserve the...