...and that is where most of the issues are going to arise. Being that the Holbrook has been around since 2010 and all of the pre-2017 releases were all 55mm, the majority of the lenses will be for that size frame. The difference of 2mm will severely affect the fit and I don't think these will work in a 57mm orbital at all.How do you think this will affect lens swaps? I have the warm gray model in 57mm and I just ordered ice iridium lenses off eBay. Hopefully they fit (lenses didn't specify size, but they're probably from a 55mm model).