Anyone have any two or four cents about a kingpost truss that would span 32 ft., 12/12 pitch? As the gable is in plane with the porch, I'm planning on having the bottom chord extend beyond the rafters as a part of the porch plate to prevent endgrain blowout and eliminate the need for inner rafters (upper chords). I'm thinking 8x10 bottom chord, rafters and kingpost, with 6x10 struts from rafter midspan to kingpost. 8x10 (rather than 8x8) rafters to avoid compressive buckling. Any comments (beyond 'get a structural engineer')?

thanks in advance,
Matt