stereo to mono conversion

Is adding the Logic "Gain" plug-in to the final step in the output channel strip, activating the "mono" button, and leaving the channel still set to stereo going to give me a true mono conversion of my tracks just in duplicate to the left and right output channels? I've been through both the two official logic training manuals(beginner and advanced), the Kevin Anker manual, and then Mike Senior's book on home recording. What I want to acieve is to run one of the outputs from my Scarlett 2i2 to an Avantone Microcube and determine how my pannings effect the mono version of my recording. Just changing my output channel to mono gives me all left and what's left of my right channel after panning. Thanks.