David...I've been playing around with articulated nymphs...currently mostly damselflies....I'm not totally happy with where I'm at...and have not fished them yet.

Re: yours I would shorten up both the thorax section and body sections but keep the body section longer than the thorax.
I would also thicken up the thorax...the more mature the damselfly nymph the more prominent is the wing case. Damsel eyes I believe are darker than yours.

Others may well have different opinions.