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About CoffeeBOS

Sales 206
On Etsy since 2013

Custom balance of system (BOS) components for espresso and coffee brewing. Why brew bored?

When I started nerding out on siphon brewing, I decided that I wanted some "balance of system" (BOS) components to get the convenience and control that I wanted. With the help of my neighbor, Aldo Valdez Bohm, a woodworker and artist, I designed several siphon brew boards for home use. I am offering the Cona brew boards through Etsy so that other home baristas and coffee aficionados can optimize the brewing potential with this beautiful brewing system. All brew boards are built by Avalbo Industries ( I receive them in the raw, sanded through 220 grit, then sand them through 300 or 400 grit, depending on the surface, and apply the oil and wax finishes. The NEWD 49mm portafilter for Olympia Cremina and Elektra MCAL espresso machines are designed and manufactuered by Richard Penney. For more info check out the CoffeeBOS website:

Shop members

  • David


    CoffeeBOS founder; brew board designer, finisher, & shipper; professional solar bozo; enthusiastic coffee geek & home barista.

  • Aldo


    Artist, woodworker, cabinet maker, canoe & kayak builder (owner & founder of Avalbo Industries).

  • Richard


    Retired product designer and prototype builder; machinist; designer and manufacturer of balance of system (BOS) components for vintage espresso machines; contributor to coffee and razor fora.

Shop policies

Last updated on April 30, 2022
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Accepted payment methods

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Accepts Etsy Gift Cards and Etsy Credits
Returns and exchanges
If you're not happy with your board, please let me know at your earliest convenience. If you want to you can ship the board back for a refund on the purchase price.
Generally speaking, I can get orders out the door within 1 or 2 business days. If I am traveling and am unable to ship immediately, I will contact you to make sure that my shipping schedule meets your needs. If it does not, we can cancel the order.

Note that the shipping prices to Canada and the EU assume first class shipping rather than priority shipping. This is intended to save non-US buyers some money. If you would rather pay more for expedited shipping, simply let me know at checkout.