I might add that most of my experiences were pre cover-all-bases hand rearing mixes were available, hence my primitive reponse initially lol! I've since done many parrots with a range of top-quality hand rearing mixes and they are both convenient and excellent.
Jamie
And since those pre-text book times Jamie there seems a strong and constant requirement to make things much more complicated than is required. A understanding of a range of approaches from the most primitive to the most complicated usually gives the best insight into what is the best process. Hand feeding grain works, and in my opinion would eliminate some of the potential pitfalls of other methods. I have done this before and it works fine. In a bind, I would use that technique again. Although primitive it shows an understanding of the basic biology of the animal. The KISS principle is alive and well.
Regards
Wing_Nut