Hey Typical171,
Sorry to make you wait so long. My guess is no one has shot the Shift here. IMO the Ti-Guide is like any other flex guard. It will get out of the way in time for you to use FOB's. I would suggest you find one to look at and flex it inward and look at the clearance, the fob has an outer diameter of 1" and are a 1/2" long. Hope this helps.
Will
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08' Martin Saber, 27.5" DL 62# DW 7"BH 32.25"ATA, Limbsaver Elite Prism Sight 4 Fixed Pin Plus 1 Adjustable, NAP Apache Dropaway Rest, Tru-Ball Rack Master Pro Release, Harvest Time Archery HT-2 28" and FOB's with Grim Reaper (Razor tip Mech & Hades Fixed) BH & Red Feather Archery Phoenix BH