I am - or rather did in .86. The new updates must have overwritten my manual changes though. It's not hard to do. The new yacht's files were in the .86 installation. I just changed names/files and it worked.
Of course the model is larger than the hitbox, but that doesn't matter (as long as you don't fly/fight it).
And I doubt that it counts as hack, as I used it for half a year without consequences.