Well, after that phone call, I think you might be right, at this point it's not really easy to confirm 100% what's what, however, as far as we `can tell, although due to paint, you feel this mower is not all original, the main point is all these parts were on cadets, as well as others, however, they were only ever all together on the cadet, so once restored and painted, this one is a cadet, regardless of where the parts came from in the beginning.
A bit like the VC-125 i'm building, which has a 125 S70 MKII engine on a vc-160 base, which is the exact same base as the 125.
As you are now no longer worried by what the specific parts may or may not have started life on, and as you have asked, this thread will now close.
If you want to add anything later, Just PM a moderator!