With only a runway of 4 tiles (open end) in the other room, the ideal timing for the stutter is to release forward for 4 frames, and repress forward on the last possible frame before the transition. It also works well to release forward for 3 frames and repress on the last possible frame. Other timings can also work, but may gain the shinecharge further from the door, leaving fewer shinecharge frames remaining. After gaining the shinecharge, continue holding forward in order to make Samus stand. Then turnaround spin jump back toward the door, and continue spin jumping to reach the transition with a shinecharge.

Entrance condition:

{
  "comeInStutterShinecharging": {
    "minTiles": 4
  }
}

Requires:

"canPreciseStutterWaterShineCharge"
{
  "or": [
    "Wave",
    "Spazer",
    "Plasma",
    {
      "ammo": {
        "type": "Missile",
        "count": 2
      }
    },
    {
      "ammo": {
        "type": "Super",
        "count": 1
      }
    }
  ]
}
"canShinechargeMovementTricky"
"canInsaneJump"
{
  "shineChargeFrames": 140
}
{
  "or": [
    "canBeVeryPatient",
    {
      "shineChargeFrames": 10
    }
  ]
}

Exit condition:

{
  "leaveShinecharged": {}
}

Unlocks doors:

{"types":["super"],"requires":[]}
{"types":["missiles","powerbomb"],"requires":["never"]}