Good question. I'd bet you can have your preamp shipped out to Indy (each time you change a cart or feel the need) for internal changes, which is a workaround and a nice option if you're local to Indy - might be expensive / sucky if you're not. For the Tempest's purchase price, that seems your best bet outside of voiding the warranty and doing your own / DIY work, as I've read UPS handling with Indy / shipping charges both ways are problematic.
Other phono preamp units that offer a more sophisticated variety of options might be something to consider, too, if you've got the green. Then, there's one vendor that currently offers a standalone phono pre, but I haven't read any Odyssey owners A-B
this piece as of this writing; I note the vendor's unit seems to have had good reviews - it's a relatively low cost unit; however, your issue of sending the unit to the builder for cartridge related changes is not ameliorated. Reading this forum finds that the manufacturer's customer service seems highly rated, but the potential damage in shipping / shipping cost issues are something to consider. Good luck.
Are U running MM or MC? I understand the Tempest can at some level handle both types.
