liners for ONEu Dynafit boots with 274 mm boot sole

[jebb_slide]

So, my wife has ONEu Dynafit boots with a 274mm boot sole length.
She bought the boots with a 24.0 sizing, which is a touch too small.
Rumor has it that this shell is the same size for both 24.0 and 24.5 standard fit sizes.
Is this true?
Can she get a size 24.5 aftermarket liner to substitute for her stock liner and get the needed increase in interior volume (tight across forefoot / arch)?
Which brand is a good for for the Dynafit touring boot?
Can we attempt this without trying on?
So totally appreciate any experienced advice on this!

[XXX-er]

Yup Dynafit uses the same shell for the 24 and 24.5, i have had the mercury and vulcan in a 24, they are also 274mm

I would take the liner out of the boot, put the foot in boot with toe touching front of shell and check for 15mm(thickness of a sharpie) behind foot, so if thats what you got its the right shell length

So the liner Dynafit puts in the ONE/mercury/Vulcan are terrible pieces of shit, that black patch sewn on top of the instep has a piece of elastic underneath you can't see so together they make up 3mm thick on top of the instep so if thats where the boot feels shitty I would not be suprised especially if you have a high instep

Some users have cut that black patch off for relief over the instep, its real easy to use a razor knife to just cut the stitching remove the piece and then wonder WTF Dynafit was thinking

I have a high instep so a tongue in ski boots always bugs the top of my foot so I like Intuition power wraps in the mercury and Vulcan