Removing phono board from PrimaLuna Three

I've been meaning to do this for a while now and need some guidance from someone who has done this. First off...is this a hard procedure? I hear it's relatively simple but I just want to make sure before I give it a whack. I've purchased an outboard phono pre and would like to convert that phono in back into a regular line in. The PrimaLuna phono board sounded GREAT for only a little extra chunk of change when I bought it but I prefer the Bellari VP129 that I purchased.