I have monokey instead of monolock stuff, so it doesn't directly
relate... but...
I think you'll for sure need an appropriate mounting plate... the mounting
plate is fixed to the rear carrier and the trunk is fixed to the plate... is swilkens'
mounting place bolted directly to the Valkyrie's fender grab handles?
Honda's lawyers make them put those lawyer stickers on there I guess.
I think the new Valkyrie's rear carrier is much more studly than the
old Valkyrie's, and I hauled a giant Givi trunk all over the country
with that one...

-Mike