I only have an old analog volt/ohm meter but will second Gill's readings.

Called Hitec this morning and they said they don't recommend using Y harnesses. Well then start making 15-20 something channel receivers to handle all the servos in the larger planes (40%), and radios with enough mixes to get them all to work. I told them my Futaba stuff worked fine (with their servos) and should probably switch back.