Here's a pic of my setup for aligning the main SFG's. Used pushpins to hold the top SFG in place while aligning with laser and square. Then a couple of drops of CA to tack it in place. Used carbon flat stock on trailing edge of top SFG thru wing to position bottom SFG. This is the only thru wing point and it doesn't hurt to add some extra thick CA into the slot. The T-wing needs 6mm depron vertical and 3mm stock for wing. Used round stock for leading edge and flat carbon for the trailing edges. You'll need these reinforcements if you plan on throwing this plane around.