I understand you use a swivel to eliminate line twists. Do you attach swivel directly to the split ring or use leader? What size line do you throw it on?

Many variables there. I always attach swivel to split ring. Use 12-15 lb line. Usually fluoro

Remove the stock split ring and replace with a sampo solid ball bearing swivel. It comes with split rings on both ends or a split ring and solid ring, which is preferable for your line tie.

I fish my spoons in the trees quite a bit, and my advice if you do is to use 20-lb line. 15-lb is fine in open water. But all the fish I found last weekend were either in the limbs of trees or clustered around the trunks.

I've caught quite a few this fall on flutter spoons but about 10 times as many on jigging spoons. The flutter spoon does seem to get them going if they aren't chasing bait.

Agreed.....I throw 6 and 7" Spaits spoons on 20lb fluoro- but I like to throw them around docks and marinas........and those cables are a bitch!