Ah riiiight! In that case I'll make the blades removable 
You just need to look at you kit with an Editing Eye ......
Make it as Versatile as you can . Then your set up for easy up grades later.
I made a Blaster out of a Sweet base pistol once ...... Then I modded the Sheebs out of it .
It looked fine , but was not fun to carry all the Time . I tried to make a Holster for it , and Failed.
I tried to make a Sling for it , but the Screws kept coming out. (thin plastic) I tried to Disassemble it to
Reinforce these areas and Destroyed it in the Process ....... I wish I had it to do all over again .
With what I know now about Costuming and Prop building it would be so obvious where to start.
But I was very Shinny when I made it so ...... live and learn. Not to mention I destroyed it in a fit of Rage.
Also destroying several Cool Greeblies and some "now hard to get electronics" in the process.
I'm just trying to help you not make the Mistakes I made .
Sometimes you need to Think ahead , then Work backward to reach your Goal ..... [ConDar Ward] 8)