I made my own swarm lure, before there was Sw.C. on the market.
The swarm lure compound is not the only important part. I have got them without it because I left it home. But it does help!
What will Reduce catch success the most, is placing the lurebox in too much sun. The scouts go in, it's 110° inside at noon, you get no bees.
The size is not set in stone as some say. My best, are the 8 frame lang size, cut to Warre box height, with 12-13 Warre topbars. Or, 2 Warre boxes. That's not the supposed ideal of 40 liters, but those catch the most. One 8 or 10 frame Lang box always does great, but I use less Lang gear, so put out less standard Lang lures. Even a 10 fr. is not 40 liters, so don't sweat it. I use hive bodies so no removals are needed. I just bring them home.
Where the box is, is Everything. The placement, facing entry east, towards sunrise, the tree size, quality of light where you put it. Dappled tree shade, is best. They like a well ventilated area, with clear flight lanes, not a smothery thicket.
The boxes are used, and/or liberally smeared with old hive goo, every thing you clean out of a hive, when re-doing a hive. Lots of dirty propolis. I'll re-apply, if it's not fragrant. I seldom put in any comb, except for used topbars, in Warre boxes. Just the leftover bits stuck on it. If you have comb, warm it, & smear it on the inside. Moths can't easily use it. Moths don't bother the cleanup goo. This will make new lures catch like old boxes.
I got over 20 swarms last year, the capture success rate was about 80%. I don't use all my lure boxes anymore.
1 box site caught 3 swarms.
All are on a low hive stand, under a tree, or set in the center crotch or on a low branch of a small tree. Highest one last year, was knee high at the bottom. Never are they put higher.
Other sucessful folks have good methods, too.
My recipe is a blend of essential oils, majority, lemongrass. Lemongrass is almost as good, alone.
I never tried S.C., but I bet it's just great, if you do all the other stuff right.
Happy Bee Catching!