The posts you found involved confusion: this is what happened.
US in 1941/2 funded Very Heavy Bombers (B-29, Consolidated B-32 Dominator) and VH Transports (gargantuan Con. XC-99, Lockheed XROE-6) against prospect of facing Germany/Japan with no close bases: as much V Long Range, as V Heavy. 10/42, UK Mission to US: one outcome was Merlin/Mustang. Another was assumption that VHB/T bases would be needed in UK: one was selected as Langford Lodge (another, VHT, was Heathrow). UK had funded Vickers T.433 (to be Windsor); 11/42 we added a licence to build B-29 as Vickers T.441, then set about choosing between them: local control, or nearly free under Lend/Lease.
In 4/43 300 Windsors were ordered, to be built across existing Vickers resources of Weybridge (then on Warwick)/Blackpool and Chester (then on Wellington); T.441 licence lapsed. Vast L.Lodge became prime USAAF Depot. US would conclude that B-29/B-32 would be assigned to Pacific; UK, that Windsor would be, too...but it missed the show.
No Uncle Joe input: he was entirely happy with the Combined Bomber Offensive: 7/4/43: “Every (RAF) blow delivered to the vital German centres evoked a most lively echo in the hearts of many millions.” M.Gilbert,Road to Victory, Heinemann,1986,P37.