Tropppo, to answer your question in the spirit it was asked, `our' (we`d prefer to remain anon through shame) best was 5 days after a blade change on a 76. In my defence, when we got round to weighing the new MRB it was 2kgs heavier than all the others (thanks Sikorsky!!) and we had to fit the runs and flights round revenue flying cos we couldn't have a dedicated pilot, wouldn't do to spoil the little darlings rest would it!! We used Strobex and Chaddy, at one point the Chadwick wanted us to fit 16 lbs of weight to one of the blades, how we laughed. Needless to say, I'm forbidden to do 900 hr inspections anymore in case I snag one again.