heres what i usually do with tsr2s
glue a piece of sprue under the vert stab pin,
cut the pin off the stab itself and drill a hole in it and the sprue (i use 1.5mm)
then cut a suitable piece of rod, this gives a better fit but still allows easy removal of the tail
cut the pins off the tail and drill them for 1.5 mm brass rod (make sure its easily bendable because you wont get the angle dead on)
cut a suitable length of rod.
cut down the exhaust tunnels so the rod has clearance