Well lets see...
Planning to restore a DC6.
We need,
4 propellors to be overhauled
4 pressure carburators overhauled
Fuel cells replaced (a ten tanker...so we have six rubber cells)
Outer wing attach fittings to be replaced
Fuselage crown skin repairs (figure 400 man hours...if we're lucky)
Landing gear overhaul
Engine accessory items overhauled
Well, the list goes on....and on.
Still, in the end, a very nice aeroplane...in fact the finest 4 (piston) engine aeroplane ever produced.
Donald Douglas (Sr) got it right...even if Jr (recently deceased) was a pain.
Sudden thought...the 1649 Constellation wasn't bad either.
Flew 'em both.
Superb machines.