I am going to assume that you want to use a luxeon led or the stock MR blade either way the following links should get the information you need on the MR sabers.

http://thecustomsabershop.com/sabers...asp?TOPIC_ID=5
http://thecustomsabershop.com/sabers...asp?TOPIC_ID=3

Do-Clo
Don't make me destroy you...