Just chiming in, as I didn't post when I received it due to travel/work.
I picked up the HHKB/60% case and my Poker fits beautifully inside. Not too tight that it would cause pressure to keys/etc..., but tight enough that it doesn't bounce around inside. I'll have an HHKB this weekend to test drive in the case, too. Don't expect differing results.
TBH - the case is better than I was expecting, kudos to intelli (and the artisan). And dealing with intelli for the purchase/shipping was a breeze. If you're on the fence - lean towards picking up one of these cases. I'm much less concerned with my flights now that I have a case for my boards.