Here was your latest List Disk & List Vol...
F: Windows partition on Disk 0.
C: System Reserved on Disk 0,
G: Recovery partition on Disk 0.
D: A partition on Disk 1.
For the clean install, you will need to delete the 3 partitions on Disk 0. So long as you do not mistakenly delete the one on Disk 1, it should be safe. But to be sure -- & so long as you must go into the box anyway to switch the SSDs -- Greg will suggest that you unplug D: during the clean install. It not only protects D:, but prevents a rare interference with the process too. So, you're right about that. Nevertheless, some day you should backup D: anyhow. It isn't immune to other troubles.
(1) What have you done so far to back up your personal files that are on F:?
(2) Let's check again there is no BCD anywhere on System Reserved...
DIR C:\BCD /a /s <<<Search whole drive for that pesky BCD