RE: Kangaroo - split elevons or sep. Elev and Ail????
back in the day I did this too my Roo, with 1/9 Rafalle canards (avaition design)
used same CG 100 mm in front of le of wing tube
I built a second Roo for a friend it did fine
and a buddy and I Added Rookie II canards to His Rookie I called it a Rookie 1.5
a seach on this subject should bring up some of my old jets