Just did some more number crunching for fun. Both the TF and the CMP are 'generally' 1/5 scale but neither are 'exact' 1/5 scale.

TF:

Wing = 1:5.3
Length = 1:5.4
Area = 1:5.2

CMP:

Wing = 1:5.2
Length = 1:5,5
Area = 1:5.9