I have both the OF 1010 and OF1400 and never had a bushing fit problem with either, using several different brands. I have run into thread differences, where the "nuts" were not cross-compatible, but they all fit in the opening.
Kreg is the one who let me down recently. I have had the bushing adapter that goes in my router table plate for a few years, as part of a kit, never used. The one time it would have been handy...it wouldn't work. The main OD of the bushing if just too large. The threaded portion goes through the smaller bore just fine.