Shipping Aesthetix Calypso/tube gear, in general

When I picked up my Calypso from the dealer, the tubes were already installed, as the dealer had set up the unit and cheked it over for me.

I will be shipping my Aesthetix Calypso. I glanced through the owner's manual and do not see any reference to shipping the unit, in regard to the tubes being installed or removed.

Is it safe/ok to ship this pre (or tube gear in general) with the tubes still installed, or should I remove them and protect them within the package?

Thanks