Nice to see you're giving us another chance
For scarring, specific inputs are press back when on the ledge, and then forward B onto the ledge as quickly as possible. It is not necessary to hold down, so press up after you sideB just in case you use up B, it does take some practice to get used to.
Semiscarring is holding down during sideB when recovering onto the ledge so that where you normally would grab the ledge, you can pass over it and hit someone who's edgeguarding you. Semiscarring is IMO better than regular scarring, but both get predictable after a while and are punishable, so be sure to mix them up. You can mix it up with a ledgehopped uair, which is what I usually do when the opponent is close, otherwise I jump from the ledge and prepare to counter with reflector.
I have a question too... I have heard of many different setups to help with DACUS for wiimote + nunchuck, but none of them worked for me. I'm only willing to change the configuration of my d-pad, one of the directions (preferrably not up) would have to be set to grab, and tap jump on and shake smash off. Anyone know of a configuration I would use that wouldn't mess up any of my settings besides the dpad?
EDIT: for scarring, it only works on certain stages with ledges such as battlefield, yoshi's island, smashville, etc. You need a smooth ledge without a lip that will prevent you from going around it (you don't go THROUGH the ledge, you actually wrap around it, but who cares, just sayin), so DON'T scar on FD.