While I was trying to modify the head and torso, I remembered that I bought long time ago a 8103 Sky Guardian so I disarmed it and grab the pieces I needed. I have some leftovers left for the final version (which currently I'm working right now). I've only modified legs (the joints leg-foot), the torso and finally the weapon. I've also take out some pieces which were exagerated for the design. So, enjoy!
Ready for some kick-ass action!
Holding main weapon: plasma-round rifle, which actually was hard because of the lack of white pieces, so instead I fil it with white/grey slide parts
Don't move or you're dead!
If you can notice, I used Sky Guardian's leg plates for the SB's legs.
Sneek Peak at back section.
Transformed, with weapon aside. Was little tricky to make it transform with all its upgrades at torso, but it was done!