The statement of a progressive spring being included really churns up a big question here:
Is Durock capable of installing progressive springs correctly? While I am dubious as to the claim that progressive springs are polar and require orientation that an assembly line might not be capable of doing on their own, TKC (who also uses JWK) had cut the progressive springs out of their fruit line due to an issue with orientation in factory.
As well, when you discuss custom molds, are you only talking about the stem or are you also talking about the housings?
Edit: I can actually read.
If springs are being installed by hand, why not offer to sell these in component pieces much like Gazzew has sold his Outemu Sky switches in the past in order to both save on costs and drive interest? I think currently a big hangup for a lot of people is this steep per-switch pricetag.
As well, will switches being going out to streamers, reviewers, etc. in advance of sale?