Well ive started construction on the second mech, its a neckbeards nightmare
Its a armoured valkyrie VF-1J
Which is not a Crusader per se, the crusader was a VF-1A, although in some artwork such as in The Fourth Succession War Scenarios, the Crusader is depicted with a modified VF-1J head.
That aside there are also scale issues, even if i were to pretend it was a crusader, this model bulks larger than the warhammer, which is not canon since the warhammer has 5 tons on the crusader.
I'm sure its the sort of thing that would only bother us purists, and it will look great anyway, maybe i could reconcile it by pretending its a Crusader II lol
(Nostalgic fluff: back in the day of lead figures one of my friends, had a Crusader in white livery, with custom Crusader rabbit decals