Well, lets step back just a moment - the longerons, in this case, are not structural AND are wrapped in glass. the purpose of the longerons is for ease of attachment, or so we have been told buy a few that hold themselves out as knowledgeable.
Since that is the case - good quality other wood should be no problem to substitute. As the pieces are bent, straight grain should be found, but as the bending is very minor, the 1 in 12: grain runout could probably be reduced to 1 in eight inch, these are not pretzel bends
Enjoy the build,njut av byggandet, godere il costruire, nyd bygningen, geniesse den Bau, apolafse tin kataskevi, disfrute la construcción, curta a construção, Pidä hauskaa rakentamisen parissa, bouw lekker,uživaj grade?inaslajdaites postroikoi, geniet die bou
maker of wood, fiberglass, foam dust, metal bits and one day a Cozy will pop out and swiftly whisk me from meeting old friends and family to adventures throughout the world