1:125 is a box scale rather than a standard one: it appeared when a manufacturer sized a hull to fit a particular carton instead of to a modelling convention. That makes it an awkward fit on a shelf, because nothing else in the catalogue matches it — accessories, figures and sea bases are all cut for the scales either side of it, so a boat built here will always stand slightly apart from the rest of a collection. A boat in a box scale is best treated as a single display piece on a base of its own rather than as part of a fleet. Where it has to stand alongside other hulls, pick a standard size instead: 1:144 submarine model kits put a whole flotilla on one shelf, while 1:72 submarine model kits suit a single boat meant as a centrepiece.