>My question to you experts out there is, morning or evening grafts result in more queens?
All things being equal (temperatures, wind etc.) it will make no difference, but if it's 80 F at 10 am and 100 F at 2 pm, the 10 am ones will probably do better. If the wind was howling at 10 am and calm at 2 pm the 2 pm ones may do better. Wind will quickly dry out larvae. Heat can kill larvae if they get over 93 F.