Chassis brainstorm help appreciated

[Vereous]

Hey all! I finished a hilt that I really dig, it's a total junk saber, all spare parts! But I'm afraid I built a hilt that's too difficult to wire up at my skill level. (Which is novice)

I say this because the inner diameter of this hilt changes. At the pommel, I have about 2 and a half inches of normal MHS v1. Then I have about 4 and a half inches of 1 inch inner diameter, so I guess that's MHS v2.

The shop doesn't have any adapters for using both chassis sizes in one saber. (if one exists, please correct me, as I think that is my solution)

And try as I might, I can't find any tutorials for making a PVC chassis from scratch that have pictures for a noob like me.

What do y'all think I should do? I'm always looking for new skills to try out.

Thanks everybody!