Shops telling you to just open your wallet and shut up? And you're surprised?

Is there something wrong with your gear that you *need* to replace it?
There's descriptions on the pages...but in short:
Black series fuselage is for the really thin wings --
only the HPS range.
S-series fuse has the spade head mount -- so everything else...
...except for the two (545 & 600) kitefoil wings (K-series have the finger mount).
Fuselages are different lengths, but fit both mast sizes with the right Doodad. Carbon mast doesn't need a Doodad.
Rear wings ... read the descriptions.
Easy :D
Wings have been getting higher AR for increased performance, so the "low aspect" wings like my 820 don't exist anymore -- the BSC wings would replace that old range, I guess.
But if shops are expecting you to part with $1.5k or more, they better be expecting to hand over a bunch of gear to demo -- it's all very subjective.