Did some volume checks to find my dead spaces.   I also finished marking the sight glasses.  The boil kettle and HLT measure the full volume of the kettle.  The mash tun sight glass measures gallons above the false bottom.  I do not care about he volume below the false bottom since it has no effect on my mash thickness.  I may make a new dip tube for the mash tun to leave less sweet wort behind but I will first see if has a major impact on efficiency.  I am not concerned about having super high efficiency just very repeatable efficiency.

Boil Kettle and HLT  = 2.3qt/.575 Gallons
Mash tun under pickup = 3.5qt/.875 Gallons Made a new dip tube
Mash tun under pickup = 2.0qt/.500 Gallons
Mash tun under false bottom = 8.5qt/2.125 Gallons