Yeah, that's what we're doing too. Should improve the pressure, and give us a "new" cupboard when the hot tank goes. I suspect we'll give it a good "test" before long.
My old boiler is now obsolete, so getting a new one in a couple of weeks. It had better work!
By the way people, you do know you're supposed to turn the heating on occasionally during the summer, so stop the sludge settling and solidifying at the bottom of the system?