1. This is the only negative I can forsee, but even then you're looking at a trade at worst (assuming they up and then attack asap) bc fox is fast enuff to just nair in space or put out some hitbox
2. From my experience, since you start up another run prior to the second thunders, sdi doesn't really matter. They di away, they fall right into your space. They sdi behind you, they still get hit with the shine and end up a lil farther. Tho if the sdi and then tech the shine its game over for the combo, word up on the tech read.
3. Stage size doesn't matter, this set up can be controlled to go either way at either time*, since the goal isn't to throw the opponent off stage or infinite them, just mix them up
*tech skill depending
Then if they think they're super cool and try and up to mindgames, just do another drill and bam, remindgamed