Going to document my MHS build here in this thread.

MHS parts list:

Pommel Style 4 (no cubes)
2" double female extension MHSv1
Male to male MHS V1/V2 adapter
2" double female extension MHSv2
Male MHSv2 to female MHSv1 adapter
Choke style 2
Blade holder style 21
Bunny Ears

Non-MHS parts list
OneReplicas low-profile control box
GOTH3d 0.99 Chassis parts (20mm speaker, 18650 battery, OLED/Board combo/2.1mm RC port)

Neopixel PCB x2 (one for blade, one for chassis separation)
Proffieboard v2.2
20mm 3w speaker

Everything is on order, I'll be updating this thread with paint, weathering, chassis and install.

Right now the plan is to fix the chassis in the pommel end of the saber and unscrew at the MHSv2 female extension to have an OLED/pixel reveal and kill-key/recharge.