Middle-layer edges

The middle edges go in with the same trigger, held differently.

Middle-layer edges

The finished layer stays on the bottom. Find an edge in the top layer with no yellow on it, turn the top until it stands above the slot whose side colour it matches, and use the trigger on the face it is against: `U R U' R' U' F' U F` sends it into the front-right slot, and the same idea mirrored sends it left.
The first layer is done, and the front-right edge is out of its slot.
Checked by the engine: F2 U2 F U2 F2 → f2l-slot(FR)
F' U' F U R U R' U'
The insert, a trigger at a time.
start
U R
U' R'
U' F'
U F
Open the case
An edge that is already in the slot but flipped comes out with the same trigger from another side, and then goes back in properly.