How to give articulated shoulder to old HG kits

Hi there! its been a long time since I last posted a tutorial. I kinda have been busy lately though, but anyways here is the new stuff.

I have been building kits for a long time now and I see that the new ones are getting more and more serious in terms of articulation. I feel that Bandai is somehow translating RG articulation to its HG line.

And knowing all this, I felt kinda jealous for my HG 105 Dagger X since this kit was based on HG slaughter dagger. The base kit has limited articulation such that it only rotates at the shoulder.. that's it.

Now to start with the tutorial..

here's what you need..

Super Glue (I think you can use plastic cement, I'm just cool with glue)

ROUND needle file (for quick sanding purposes)

FLAT file (for quick sanding purposes)

Side Cutter (trusted nippers)

X-acto Blades (any blade would do)

PlaPlates (very essentials)