Nick, . .I have read your post twice, and sorry to seem a little dim, but do I understand from your post that the higher in altitide and up to max weight will create a greater problem at the bottom, than at max weight and lower altitude, I practice Autos as often as I can, as you say to give my mind the background that "It may work on the day", and I have done the same with a full weight R44 and B206, but that was from entry at 1500ft, if it had been much higher, would it be affected by the max weight and the prolonged influence of gravity ?
My regards