correct.
when i (eventually) get this ITB manifold done, i would be asking no less than $1500 to build another one, purely because of the development and labour that goes into it.
On the topic of twin tb's etc, i have a set of twin 52mm (IIRC) Cadillac Catera tb's that i managed to score through work, that i planned on adapting to a modified stock KA plenum, by way of a new flange section to allow the tb's to bolt up and increase the overall volume of the plenum by another 0.5L.
I can still do this and get it working flawlessly on the KA if someone wanted to buy it, but again, i'd be asking no less than $600 for the complete bolton assembly.