I'm starting an Astro Hog. The balsa and other woods are beautiful, as has been the case with every Sig Kit I've built. I'm writing primarily about the thrust issue. Most designs set the engine about 2 degrees Negative incidence and the horizontal stabilizer at 0 degrees incidence . The Astro Hog plans show the engine at 0 degrees incidence while the horizontal stabilizer is at Plus 1-1/2 degrees. So the relationship between the engine and stabilizer is like having some downthrust.

BTW I'm building with one-half the designed dihedral or 3 degrees angle of the root ribs. My feeling is that the Astro Hog was designed at the dawn of multichannel R/C before they even had control sticks with proportional travel! They were moving the servos with bumps of on-off switches! So I think they relied on more stable designs while modern R/C equipment allows us to easily control less stable designs. My second Hog-Bipe flew really well with the lower wing dihedral reduced.