I'm experimenting around with using the m rig setup with a hitchclimber pully. I would like to be able to route the climb line through the two chosen crotches from the ground, rather than while in the tree. I haven't been successful at it due to difficulty of isolating the two tips using one line from the ground. I'm thinking it would be easier to just set two separate climbing lines and connect them to my bridge. Other than the extra line needed, is there any practical difference between the m rig setup and using two separate climbing lines. I really like the stability of support coming from two angles. Especially on limb walks.