Has anyone done this? Seems like a great way to disperse scent, getting lots of airflow. Maybe a smudge of skunk essence on a feather above the set?

Just don’t hang the flagging directly above your trap, if the lure drops down you don’t want it on your trap bed or it can cause digging

I place lure up high on flaggings I've had good luck, I thought I had a photo of set construction with flagging of sheep wool up high with lure on that and fence post but I guess I've deleted it.

No good.
You want good smelling call lure near the ground where it will leave a scent trail for the animal to follow to your set.
Put it up high and it goes away on the wind leaving little if any on the ground for the animals to follow.

I wouldnt want a scent lure on flagging-flagging brings in animals from far away,by sight,so they will find your call lure and follow it to the set.
The only exception would be if you use a sight attractor in a cubby for cats to entice a cat to go in.This is not what i would consider "flagging".

Castor wrapped in a hayball,or some cat lure on a flying squirrel or rabbit skin in a cubby will often get the cat into the snare or trap in a walkthru setup.

In winter a big bait will provide it all.

All I can say is I gang set with species specific sets at a draw.I dont consider any winter fur here trash.
I am happy even with the weasels-I have a good market for them and they are easy to tan.

Amen add two traps and it's pay dirt

Most thought provoking thread I've read in a long time, guys! Thanks!

Sent molecules fall to the ground as they travel through the air well because they are heavier than air. This is why call lure up high works better than down low and more so in colder climates. Also if the wind is shifting through the time frame between checks this creates multiple sent trails to your set or in sight to your flagging.

I dont want a weak scent scattered around,I want a strong defined scent trail deposited on the ground by the air current close to the ground.The scent trail lasts much longer this way if you are depending on scent lure alone to direct an animal(cat,canine) to your set from the flag.
For marten,lure goes near the base of the tree where the baited box is set.And a smear of bait on the base of the tree. The box is filled with freeze resistant bait(stronger smell in deep cold) like beaver meat.
Those applications produce the best results by far in the boreal.

I am ,,,,make a couple sets guy ,,, because iny experience cats from year to year use the same crossings I have use flagging and not ,,, but a call lure up high I do, and I might use the same call at the trap like skunk.
Or use 1 or2 different ones at the trap that has worked for me for years

I'm not a cat expert but the only thing that has put cats in the trap consistently for me is putting the trap were the cat is going to step anyway ( blind set). If u want to add some lure or eye appeal there great but I just can't catch cats if I expect to attract them TO the set. Also if u ever get a chance to listen to Mercer Lawing talk cats, set up and pay attention and consider yourself blessed. That about everything I know about cats other than the cover that rabbits like is the same cover cats like...

The call lure is to get the cat in visual distance of the flaging which is VHS ribbon then my set probably a cubby has feathers on and around it. I want something catching the cats attention every time it finds something so it keeps it moving in the direction of my set.