First you will need 2 troops
that look like this
On the first model you cut here
after that on the Same MoDeL cut here
Now you should have One gunless model, One model that has not been cut, and the magority of a gauss flayer(gun). You will definetaly need this section
of the gun >
Place the gun on top
of the of the other models gun, make a few cuts until it fits on top and looks like a gauss blaster
. When you have it the way you want the gun glue it on top. Your guy should now look like this ignoring the shoulder pads.
Now if you would like make shoulder pads for your Immortal you can use thick card (which can be found on the top of cartons) or you can make the pads out of green stuff. The pads should look like this...
Also you can add a gauss gun coil right here
It adds a more professional and clean look.
You might of lost 2 necron warriors but when you work it out it is cheaper than buying Immortals.
I hope you enjoyed this tutorial here is the final product...