I found the build of the Hog Bipe to be smooth and straightforward. Mods as suggested by JimT are all a good idea.

I also found that I needed to add right thrust and down thrust to the engine mounting. Of course, your mileage may vary on these.

You may want to visit: http://www.fubarhill.com/ to see what others have done. Go to the section on "Current planes > Sig Hog Bipes"