MLS: "These units currently fit into the Bane, War Glaive, Dark War Glaive, Arbiter, Dark Arbiter, Consular, Archon v2, Bellicose, Shock LE, Dark Shock, Manticore, Overlord, Menace and Raven." ::
https://www.ultrasabers.com/product-p/mls.htmLED: "This unit has a 1" outer diameter. This unit currently fits in All v2 Models, All v3 Models, the Guardian, the Monarch, All Reaper Models, All Mantis Models, and All Scorpion models." ::
https://www.ultrasabers.com/product-p/led%20module.htmUS doesn't say the diameter of the lightsaber hilts, but for LED, there is "a 1" outer diameter". The thickness of the metal of my Dark Initiate LE v3 (which, of course, uses a LED module), is exactly 0.5 cm, and the full diameter is 3.75 cm. If your PVC has exactly these dimensions, definitely use LED. Can someone else post their dimensions of their Ultrasaber with an MLS unit? Also, Trever, what are the dimensions of your PVC? You might have to change it a bit.