I'm always curious, how do you go about adding all those rubber legs on your flies? Are you tying them in a few at a time, wrapping them like hackle while leaving one end of the bunch attached to the rubber they come on, or putting them in a brush or loop or something?
I've been kicking around the idea of using legs like that on some albacore trolling flies
Hey Nick let me see if I can explain the different ways I do it. The key to a skirt is all in the flair. Basically you want 360 degrees and you want it out from the body. This creates a pulse on retrieve. You dont want clumping or lumps in the rubber. When it dies on retrieve or jigging on the bottom you again want it to spread out and move or breath if that makes sense. This is the key.
In the gear world this can be achieved as simple as a small rubber band or oring with 2-4 tabs of rubber through it placed on a thick lead jig head. The thickness of the head helps to evenly space it 360 degrees around the hook/head. This is what you see with spinnerbaits etc.
In the bass world a punch setup became popular several years back. This is a bobber stop, a large tungsten weight, a hub with the skirt flairing out and then a hook and a rubber bait rigged weedless. This is used often with very heavy line (65 pound braid) in heavy cattails etc.
Ok so onto the fly world...
The challenges are being able to throw it. I think 2 tabs maybe 2.5 is tops for fly fishing due to weight. You want a large even thread base on hook to work with. If you want a mix of colors just set the two tabs on top of each other and with a heavy thread or even braid or wire tighen almost like spinning deer hair. Work around it and tighten as you go. Massage it with your fingers and again tighten as you go. Keep the wraps close to each other and dont over do it with thead or wire etc. It doesn't move much or slip I have found. If you wan't different colors you can place a tab on top of hook of one color. Tighten. Highlight colors where you want them. Tighten etc. Final step is to trim it. I like my skirts all same length. You can also add maribou or schlappin or flash before advancing thread but often rubber gets in way and this can be tricky. I then pull all rubber towards back of fly and makes sure its 360 degrees and build a small thread dam in front further locking in place.
Another way is using a thick hook or nail and a rubber grommet like this:

You tie it in same way. Then you have a ready made skirt. I use this on my poppers quite often. As far as I know I'm the only fly guy to ever use something like this but the gear guys do for their punch setups. Here are some sample skirts I made to give ya an idea:

Here you can see how much thead I tie it down with:

Here are some hubbed poppers:

Check this site out I think you will like it:
https://fishingskirts.com/product-category/skirts-unlimited/skirt-making-material/glitter-scale/