I use three switches. I rarely change the rudder but the elev and aile I change all the time. For 3D I use high rate most of the time with a lot of expo. Like 50% on aile and 70% elev. I like to put a some precision in the routine. So if I do a rolling circle I want high rate elev and low rate aile. Most of the guys I fly with put all the mixes on one switch. I think my way is better but does take some getting used to. Also I put a short piece of fuel line on the elev and aile switch. This way I can find them with out looking.

David