Vic,
This may interest you. Plugging your Spit figures into my handy-dandy wing loading calculator I get the following for your Spitfire:

Wing loading is 36.1oz/Sq Foot and a cubic loading is 12.45

Cubic Wing Loading Values between 8 and 10 are considered good for aerobatic aircraft, between 10 and 11 are considered good sport models and values between 11 and 13 are for heavy warbirds. (Sailplanes are something like 4 to 6)

The Taylor Spit as per prototype is as follows:
Wing loading is 27.6oz/Sq Foot and cubic loading is 9.5

Jose's Spit came out at 33.3 & 11.47

The formula allows for the reduced Reynolds number effect which decreases as the model gets larger.
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Merlin