I used to have my rangefinder and GPS attached to their pouches by a FHF lanyard, but found the lanyards just got in the way. I quit carrying a GPS because it was just dead weight unless I was in checkerboard area, but still carry a rangefinder sans the lanyard.

The only thing I keep teathered nowadays is my compass, which slides into one of the open front pockets of my FHF bino harness. I just loop the cord the compass came with through one of the harness's sewn on loops on the bottom. I'd probably just bury the compass in my pack if I didn't use it so often when hiking in the dark, making sure I am headed in the right general direction to reach a ridge or whatever else. It'll get lost easily in that front pocket, so I make sure it is tied on for sure, but that's it.

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