Quoted from waynetrane:
Thanks for your posting, but i have to take the bb off complete.
Because we have to move it in the house 3 level up with very less space in the staircase.
So take this disclaimer: I don't work for Spooky, this is not official endorsement or advice, and you should bear all risks and proper judgement while considering removing the head from any modern pinball machine. It probably voids the warranty and is a risky maneuver. However, having said that, it's not really that hard to do if you take your time and use cautious sense. People do it safely all the time.
Essentially what you need to do is unplug the game, then carefully trace every cord and cable that runs from the head into the lower cabinet. Check and double-check. Take pictures. Tag them with tape. Note how they're routed around obstructions. Make sure you personally touch every one so you have that visual reference of what went where. Then carefully unplug and drop the connectors into the lower cabinet. Leave all boards, etc installed as they are - there's no need to remove them.
Now, inspect the hinges connecting the head to the cabinet. Spooky (or is it Pinball Life?) even sell aftermarket mod hinges, so you know these are removable. At any rate, make sure the head is stable before you remove these hinges. You can probably unbolt them from the head, leaving them connected to the cab. Once the hinges are disconnected, you should be able to carefully remove the head (after removing any other latches or bolts that may be used on a given game). A second person would likely be very helpful for this entire section. It's easiest to lift the head off from directly behind the machine - don't tempt fate by trying to stretch across the playfield.
After you relocate the game, set up the lower cabinet properly. Then carefully set the head back on the lower cab and secure it with latches/bolts/hinges - again, a second person can help stabilize and balance while you get the head tightened up. Then raise the playfield, reach behind/below and feed the cables back into the head to plug them in, making sure to double-triple check your connectors. Ask if you're not sure! Once you're confident everything is in the proper place and seated tight, plug the game in and go from there.
You can probably do it all in an hour, but don't rush. For what it's worth I'd wager some Sys11 and WPC games are likely more difficult to do than modern games