Stupid Question Time: Chrome Dash Gauges

I’ve got a 2000 FLD120 and bought some of those plastic chrome gauge covers last night here at Iowa 80. Now, I do all the work on this truck and have no problems working with the engine, etc... but I can’t for the life of me figure out something so simple as to snap these covers on! Looks like I have the standard sizes in my dash, but the problem is that the covers look to be just a smidge too small and won’t fit over the black portion of the gauges. Sorry for the stupidity here, lol, but what in the world am I missing? Are they just that tight?? Can’t really slip them on without marring up the outside of the gauges. Thanks for the help and the funny comments that might be coming.