Are resistors needed?

Hello. I apologize for noob question but wanted to make sure before I got too far into my conversions. I'm working on doing a LED conversion on the 2005 Luke ROTJ MR, 2005 Anakin ROTS MR and the 2006 Darth Maul MR and will be keeping everything else the same including battery pack, sound board, etc. I just wanted to verify that if I go by the tutorials listed using the LEDs linked that I will not have to include resistors in the wiring. Its not mentioned so I assume its not required but want to double check.

Thanks!

I recommend you put at least a minimal resistor on any LED you install.