A fluid flow plate for an electrochemical assembly, comprising: a plurality of first fluid flow channels (13, 14, 22) extending across an active area of the flow plate to define a first fluid flow field of the fluid flow plate; a plurality of second fluid flow channels (13, 14, 22) extending across the active area of the flow plate to define a second fluid flow field of the fluid flow plate; an array of first fluid transfer points (301, 302, 303) disposed along an edge of the first fluid flow field for communicating fluid into or out of the first fluid flow channels; an array of second fluid transfer points (301, 302, 303) disposed along an edge of the second fluid flow field for communicating fluid into or out of the second fluid flow channels; a first fluid distribution gallery (215, 216, 221) having a first peripheral edge portion bounded by the array of first fluid transfer points (301, 302, 303) and having a second peripheral edge portion (320, 321, 322) forming a first fluid communication edge of the fluid flow plate, a second fluid distribution gallery (215, 216, 221) having a first peripheral edge portion bounded by the array of second fluid transfer points (301, 302, 303) and having a second peripheral edge portion (320, 321, 322) forming a second fluid communication edge of the fluid flow plate, wherein the first fluid distribution gallery (215, 216) and the second fluid distribution gallery (216, 215) are shaped such that the combined lengths of the second peripheral edge portions are longer than the first peripheral edge portion of the second fluid distribution gallery or the first fluid distribution gallery, and wherein the fluid communication edges of the fluid flow plate comprise both internal and external edges (310, 311) of the flow plate, the internal edges of the flow plate comprising edges of the flow plate defined within a hole, aperture or port passing through the flow plate, and the external edges of the flow plate comprise an outer peripheral edge of the plate. a plurality of first fluid flow channels (13, 14, 22) extending across an active area of the flow plate to define a first fluid flow field of the fluid flow plate; a plurality of second fluid flow channels (13, 14, 22) extending across the active area of the flow plate to define a second fluid flow field of the fluid flow plate; an array of first fluid transfer points (301, 302, 303) disposed along an edge of the first fluid flow field for communicating fluid into or out of the first fluid flow channels; an array of second fluid transfer points (301, 302, 303) disposed along an edge of the second fluid flow field for communicating fluid into or out of the second fluid flow channels; a first fluid distribution gallery (215, 216, 221) having a first peripheral edge portion bounded by the array of first fluid transfer points (301, 302, 303) and having a second peripheral edge portion (320, 321, 322) forming a first fluid communication edge of the fluid flow plate, a second fluid distribution gallery (215, 216, 221) having a first peripheral edge portion bounded by the array of second fluid transfer points (301, 302, 303) and having a second peripheral edge portion (320, 321, 322) forming a second fluid communication edge of the fluid flow plate, wherein the first fluid distribution gallery (215, 216) and the second fluid distribution gallery (216, 215) are shaped such that the combined lengths of the second peripheral edge portions are longer than the first peripheral edge portion of the second fluid distribution gallery or the first fluid distribution gallery, and wherein the fluid communication edges of the fluid flow plate comprise both internal and external edges (310, 311) of the flow plate, the internal edges of the flow plate comprising edges of the flow plate defined within a hole, aperture or port passing through the flow plate, and the external edges of the flow plate comprise an outer peripheral edge of the plate.