Okay, I'm just offering a suggestion here, no pictures or anything.
I was experimenting with parts of my 500 Edition Darth Vader and my Evolutions Darth Vader, and I had an idea. I popped off the right hand of my Evolutions Darth Vader, and tried to pop on the right hand from the 500 Edition Darth Vader (The hand meant for holding a lightsaber.)so my Evolutions Darth Vader could hold a lightsaber in his right hand. The hole in the 500 Edition Darth Vader right hand is to small for the peg on the Evolutions Darth Vader arm.
I wanted to let all of you customizers know that if you either trim down the peg on the Evolutions Darth Vader right arm, or make the hole bigger in the 500 Edition Darth Vader right hand, you could probably give the Evolutions Darth Vader a right hand capable of holding a lightsaber. I hope this helps some of you guys out.