If you want, just hang on a little bit.. I'm helping Nanner resize his mod, and am rescaling all of them via Max units. That's turning out some interesting missizes, even in the Taldren models.
Or better yet, I'll give you the unit formula I'm using and some examples..
Ship Length * 0.041967289719626168224299065420561 = Max units
So for the Galaxy at 642 metres..
642 * 0.041967289719626168224299065420561 = 26.943 Max Units
So if you click on the Measure tab while you're scaling, you can size everything by Max units, consistently across all the various types that you have, and consistent with a source like Ex Astris Scientia (where I've been getting the various ship lengths). Then it's just sizing the standard ship types to that formula (like Connie, Excelsior, Galaxy, Soverign) for each era, and you'll have a properly scaled baseline to scale any variants and kitbashes by. Like if you know Mackie's Davids uses TOS Connie components, you can bring that in with a properly scaled TOS Connie (at 295 or so metres) and match the saucers or other components for size. Then you should get a pretty closely scaled non-canon ship. And you should be able to do the same for the Remora.
(By the way, I got this number '0.041967289719626168224299065420561' by dividing the Max Unit size [in this case 26.943] of the stock Taldren SFC 3 Galaxy against the stated length of the ship at Ex Astris Scientia (642 metres). That gave me a baseline for Nanner's TNG era mod. For a TMP era mod, a good idea would be to use the Enterprise or Excelsior as the base, and work from there.
Should also nicely apply to other races.. for Klingons, use the stock K'Tinga or Negh'Var depending on era, for Rommies use the D'Deridex Warbird. That kind of idea.
Haven't gotten as far as that with Nanner's scaling project yet though simply because I've been installing a new HD in my system the last day and moving all my setups onto it one drive at a time. (That way, I don't lose too much time, and can pick right up where I left off without reinstalling everything and re-customizing things to my liking all over again.)