After some deliberation, decided more info may be beneficial: perhaps using 57" wingspan (28.5" each side) and the 14mm shown here can give some idea of appropriate dihedral angle... Including other info that may be of importance. Really happy to hear it helps; please don't hesitate to ask for other close-up detail shots.

Always felt that the landing gear (undercarriage) was too far forward making the model unstable during take-offs (wanting to ground-loop); eventually raked wire gear aft and fabricated the aluminum landing gear pictured in the second pic of my previous post with considerable rake aft to bring it back where it was thought the main wheels should be to try to alleviate this problem (wheels just under L.E. when viewed from above).

One side note about Yoshioka kits - they were so well engineered and packed that it seemed if you took a few too many pieces out of the kit box to examine, you would never get them back in the same orientation to be able to close the box lid entirely again...