[fdix]

For hinging I do the classic elastic flap. Cut it on the underside without cutting through the upper skin, bend 180deg and then have fun sanding. Put a small pieces of fiber reinforced tape at each end and in the middle of the control surface to stop it from tearing, works great so far.
If you plan on using 1" fiber reinforced tape get the unidirectional type and cut it in halve to save weight!

I do not know what density the epp is I used. I get it in 5.5mm sheets. The empty airframe is 1 or 2 grams lighter than the Depron version so I guess the density of my epp is halve the Depron's. Depron is 40kg/m^3 right? Form that I would say I have the 1.9 epp

On the wing I use flying wires made of Elmex non waxed dental floss which is pre stretched (important!) for a few days. Just attach one end to the ceiling and the other to something heavy. The tail is reinforced with 1mm carbon rod.

Sorry no plans available. All Locos come as CNC milled kits.