Malay is a little of a stretch of imagination itself, some of the same thought processes that went into naming Malays "Malays" named Native Americans "Indians" and mistook North American native poultry for birds from "Turkey". Not that there aren't some people with darn nice Malay, but it's most likely that every Shamo, Thai, and large Asil that a Dutchman sold to an Englishman got stuck with the name "Malay".
The Saipans, according to some guesses I've heard from men I considered learned, are most likely Shamo in origin. By all accounts some lady in Louisiana had the best in the country and her line died out. Hatchery Saipan are a recreation of an almost fictional bird, using some oriental based birds.
Trimming wings on gamefowl would be considered heresy by some.
Yes 24 inches is the magic number, you don't want a big bird hopping down from any farther than that. If he can fly down out of a tree and utilize a ten foot landing strip and run to a stop he can come down out of a tree, but it's the hop down that can lame them up. It is good exercise for them to fly up and jump down, though, they will get fat.