the one thing I will tell you is read Matts instructions only
watch his video and do the steps with him. It will keep you from jumping the gun
Almost every fail I have read came from people skipping steps or not waiting until it was through
Yikes! Nothing like dredging up an old Post. If you already have a mRo, yes. The GC works with it. If you haven't yet upgraded then the HERE has several advantages over the mRo the most important moving the compass out of the leg to a top, front, and center position that is less susceptible to that pesky mag interference.