There is a couple of small details missing in the roe bag/egg tie mystery...The colour of the spawn sac you use is very important. They come in a couple of shades of pink, hot pink, white, red and chartreause and a couple of others.....Best thing to do is a litle experiment with the varying colours and add small/different coulours of wool and see which one works the best, depending on where you are fishing.
Locally the red/pink colours seem to work best for coho, the all red spawn sacs seem to be the best for springs, and the hot pink for steelhead.
As far as the eggs go, the water hardened eggs of chum or spring salmon work the best. They are durable and will last for a dozen casts or more, even in fast water...Regular cured roe will "milk out" a little faster, but works very well, also..........Ortho 8)