A few more details on the progress so far.

Since I got a bit tired of working on the wings and had already framed up both and separated ailerons/flaps from the wings, I only rough shaped the wing tip balsa blocks and glued them on.
Prior to separating the ailerons, I traced the outline of the tip onto the wing tip blocks and then hollowed the blocks before gluing them on.
Since the tips are quite soft and lightweight, I don't think I will save much weight here though.

The wings are now ready to start shaping the leading edges of the ailerons and mount the hinge points.

The tail feathers have been built for the most part. Elevators are ready, so is the stab and fin.
Only thing so far that I'm not too happy with is that the skins for the stab and fin is 1/16" balsa and is quite soft.

Fin and stab are built from a 1/4" thick frame sheeted with 1/16 balsa while elevators and rudder are 3/8" open frame construction. Nothing unusual here.

The elevator have 1/8" plywood pieces recessed into the balsa where the joiner is inserted. These plywood pieces also double as strong points where you mount the control horns. Since I will not be joining them, this is probably not necessary but I figured I'd fit them anyway for added strength and also for a solid surface to screw the control horns into.

The rudder frame is pinned down on the board at the moment drying.
The plans show a similar plywood reinforcement of the bottom front corner where the tailwheel wire is supposed to slot into between the plywood pieces.

I will not be using the stock tail wheel setup because I don't like the direct coupling between the tail wheel and the rudder. Nor will I be using the stock rear mounted rudder servo. I am planning to try to come up with some sort of a pull - pull arrangement for the rudder and spring couple the tail wheel to the rudder.
I still haven't worked out how this is best done because the rudder sits completely above the tail section of the fuselage and I don't like the rudder pull-pull wires and control horns to be exposed there.
I suspect some sort of control horns can be soldered onto the stock tail wheel wire and sit underneath the stab / rudder.

Some photos below: