Kalita 155 + 51mm puck screen?

I know people recommend the Flair pro screen and sibarist booster 45 for flow rate as they fit perfectly in these flat bottom brewers, but they are very annoying to get where I am. I could easily get a 51mm puck screen for like $2 but I'm not sure if the extra 6mm will make it sit awkwardly in the brewer. Can anyone verify/check? Thanks.