I am sorry for that. If you fine, please, try the following again.
And, yesterday I asked a DEF personel about this fit issue,
and he said that one may need some works (like sanding) to fit the resin with the plastic parts,
but it must be not so difficult for whom has experiences on treating resin parts.
And, this is just similar to what I've heard about the DEF M1070 wheel kit
from other modellers here, i.e. no significant fit problems.
I hope this would be helpful for you.