mike_brandt

gr5has the way to Design in the structure for fins could you also put in . 1mm tubes to force a rod to be made with the rod you could make a tessellated structure or a triangulated beam internaly to the skin. if the rods/tubes did not touch the outside i would expect that you would need to cap the open end of the tube. by increasing the size of the tube center the size of the rods could be increased with a minimal internal space. a pre made rod framework could be made in solid and subtracted from the model this would preclude the need to cap the ends of internal ending tubes and simplify the design this is all speculation and should be taken with grain of salt.