ucando 46 need help to setup for 3d

ucando w a satio 72 tried 14x4\cutdown 14x4\12x6
next 14x6.
not enough to pull out of hover/
? what is a good rpm w\14x6 prop on satio 72.
did not wieght it yet but cg aft had to add weight to nose i think 4-5 oz. to cg at 4.3\4..
?how far back can i go on cg with out making it toooo unstably..friend has ucando 60 setup 2"aft of recommended cg..have all dig hitec servos 5945 on ele,rud,a lighter for ailerons forgot number..
any other setup tips would be great just learning......[8D]