I'm planning on getting back into competing after years and years away. Last time I did it was IDPA (only a few matches) with Gocks and Berettas. I'm full on into 1911s and 2011s now. Are ambi safeties a good thing for IDPA and USPSA or can you do what you need with a single sided safety? I'm planning on doing carry optics in IDPA with my Stacatto P Duo, and I'm looking at a single stack for both IDPA and USPSA use. Some companies seem to hate using ambi safeties on their guns (Colt, Dan Wesson, Nighthawk) and some (Springfield, STI) put them on everything. For a strictly competition gun is there a difference or is it personal preference?