I have read mixed stories on the grams guts in MBX tubes. If they work...they work well. If they do not, I will put my newer MBX guts back in. With that being said, for what ever reason, grams springs feel much better than the MBX springs. If they do not work I will try putting the mbx follower on the grams springs and see if that works. I have not checked compatability.
Thanks