Sirs: regarding float inflation, would suggest that the floats be popped below float vne, the emergency float systems i have installed and worked on certification testing would normally be popped well before the flair, usually around the 1000ft mark, this allows the floats to inflate and settle, then the pilot can concentrate on a smooth auto. as for a/c weight, the floats are designed to provide floatation on max gross a/c, one should also check if the floats are certified as ditching or emergency floats, there is difference.if you wish there is very good promo video available from apical industries showing real full on autos of many different helicopters, let me know if you would like one and i will pass your info onto apical.