Your CV angles in your other thread look completely fine, mine are quite a bit higher, even with the diff drop. (Are you sure you're at 3" lift? Maybe mine is more like 3.5"?)
The RCI skid plate should have came with 1/4" spacers for the back bolts and the Wheeler's diff drop kit I used came with 4 similiar spacers for the skid plates. I actually had to add a couple washers for each bolt to space it even further down. I couldn't have a Toyota tech take my skid plate off and expect it to go back on the same way with all those spacers stacked on there.
It has held up alright but I'm still seeking a more permanent solution. (I would take pictures but the skid plate isn't on my truck currently) I might need to machine a single solid spacer for each of the bolts .5" long. Or two solid bars .5" thick that run across the skid plate along each crossmember for more strength. Maybe machine down the diff spacers to .5" and find a compromise between skid plate spacing and CV angles.
Sorry for the paragraph, I just don't like spacing my skid plate down. I've actually though about selling my RCI skid and making my own skid plate .5" lower so at least I don't have to worry about stacking spacers.