i don't putted retract in laser arrow, but I am making this mod on a BTE delta vortex.

the mods I made on the arrow are

-install a antena tube runing along the trailing edge (inside the plane), put it close enough to the trailing edge to allow that it doesn't interfer when you will install the fins after covering.
- glue tri stocks on the leading edge of the elevons, this reduce the sanding job of the "v" shape to nope
- I cutted the edges of the elevons to improve a bit the look

in the pic I join you can see the antena tube going in the 'radio compartment box' look trough the covering. This pic is my.45 arrow, you can also see the cut of the elevons