u/Tidderfit

What is the back clearance for HotSpring Grandee with CoverCradle? The dealer called it a "Kit F", but I didn't find any info about that with Google.

Some possible answers I found:
24" / 61cm (AI / Google)
28" / 71cm (Dealer website)
30" / 76cm (Dealer technician)

What would be the correct answer?