In case you can't makeperfect joints and still really want a super strong joint--and many kits simply have butt joints -(super design guys ---)
try this.
rub the end of the stick in baking soda (not baking powder)
push the joint tight and drip on some thin ZAP.
OR assemble with dabs of thick CA then lightly dust each joint with baking soda -to fill any void.ZAP the joint.