If you follow the leading edge of the horizontal stab there is no trim in the elevator the elevator is not tapered but the stab is foiled from the front to the hinge line. Wedge shape for positive solid wing hold when tracking a line and with the elevator squared off reduces losses. The flight test on Sunday had the .020 with the cg on the money the plane tracts straight and level on power and in glide its fast and hangs well.
Yes 20w IC isn't much to work with power wise but you can take advantage of its low 14g weight and so far has been enjoyable to use.
The 40w engine has plenty to power this 53 Sq/in wing - could do 40 sq/in and still grease it in without too much fuss if stuck going downwind.
The fuselage has plenty of beef to support the TD .020 power and weight makes a good match to this plane.