A debt of gratitude to Chanan, a friend who started catching them by accident. Some of these ideas came from him, he's the one who motivated me to try.
Here are some tips to help better your odds:
1. Only the tiniest piece of worm is necessary, 2" at most. Any bigger and they'll just steal it.
2. Always thread the hook through the center of the worm, again to stop them from stealing it.
3. Tube length doesn't seem that important, but trolling speed is. I've found that to get porgies you really have to bounce bottom more often. If not, you're not in the zone and will get less strikes.
4. Downsize, downsize - the hooks must be smaller, but not too small... they'll pull if you get a keeper bass. I think he was using 3's and 4's, I'm using circle 5's and have gotten them on that Finchaser rig. However, you would be well advised to downsize them to smaller, you'll increase your hookup ratio.
5. You will get a lot of smaller ones bashing it, but if your hook size is right you will miss those pesky little critters, leaving you to concentrate on the jumbos.
6. Mussel beds. Find the mussel beds, find the porgies. I generally do this when I'm drifting worms and remembering where the sinker dragged bottom and I could feel the mussel beds.
Don't just take my word for it.
Give it a try, it's a blast!