OK, if your a numpty and have two left hands, stop reading hear and phone someone !
But.........If you are anyway capable and have a friend to hold the gun flat, you can do this yourself with no trouble.
You will need a good cordless drill that runs true + the drills and taps, if you have them it's easy.
First strip the gun as per the instuctions in the manual that's downloadable from planet.
With the hole posistions marked have a friend hold the body flat on a flat surface and then start to drill applying a very light pressure. As aluminium is a soft metal it's very easy to drill and drilling my eye holes was a doddle but then i'm an engineer with super powers
IF YOU ARE IN ANY DOUBT, PAY SOMEONE ELSE
+ have you considered buying a S/h e-blade ready to go (their cheap now) and then flogging your gun to a rec-baller ?