There are be builders out there who can tailor a specialty frame to meet one's specialty desires.
the front center matters just as much (or more) if you want a more stable handling bike. In this measurement, a centimeter is as significant as an inch of chainstay. Tandem riders will verify, we know looong wheelbase characteristics, but that front-center is the primary determinant of steering response.
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Vintage, modern, e-road. It is a big cycling universe.