Hi Ven. Apologizes for missing your post. Would appreciate seeing some photos of the saber club and of the customization done to that Libby. You have chosen some good stunt dueling sabers. If you put the two Sentinels with blades together and add on an extra two inches for a coupler ( unless using a flush coupler ), you will get an approximation of the saber length. My suggestions are for an Initiate v3 - v4 with 24 - 32" blades. The v4's are a bit lighter but the v3's have better choke points.
Your height does play a factor in your choice of overall length. If getting v2's the Aeon/Dominix is the best choice as the v2 Initiates are shorter than the v3's. I call them Yoda sabers. For the v2's the blade goes 2" into the emitter. The great thing about the v2's is that there are 2 retention screws so your staff blades will be amply secured. A staff with two different colors looks really good when spinning. Hope this helps.