I have a three gang box that will have three single pole switches in it, and I am bringing the power in on one 20A circuit. No problem bringing power to each of the loads, just pigtailing the power black to the switches, and the load black off each switch. Tie all the load neutrals to the power neutral. The question I have is how to ground the switches and the loads. I can only put four #12 in the wire nuts I have. Can I use two pigtails like the attached?