let HL = 0;
let VL = 1;
let VC = 2;
let VR = 3;
let HR = 4;

class Data {
    static getData(cb) {
        xhr.get('/api/settings', cb);
    }

    static sendData(data, cb) {
        xhr.put('/api/settings', data, cb);
    }
}

let HL = 0;
let VL = 1;
let VC = 2;
let VR = 3;
let HR = 4;

class Data {
    static getData(cb) {
        cb(null, {
            sensitivity: {
                strength: 0.7,
                power: 3
            },
            thrusters: [
                [
                    0.0, -1.0,
                    90.0, 1.0,
                    180.0, 1.0,
                    270.0, -1.0,
                    360.0, -1.0
                ],
                [
                    0.0, 1.0,
                    90.0, -1.0,
                    180.0, -1.0,
                    270.0, 1.0,
                    360.0, 1.0
                ],
                [
                    0.0, 0.0,
                    90.0, 1.0,
                    180.0, 0.0,
                    270.0, -1.0,
                    360.0, 0.0
                ],
                [
                    0.0, -1.0,
                    90.0, -1.0,
                    180.0, 1.0,
                    270.0, 1.0,
                    360.0, -1.0
                ],
                [
                    0.0, 1.0,
                    90.0, 1.0,
                    180.0, -1.0,
                    270.0, -1.0,
                    360.0, 1.0
                ]
            ]
        });
    }

    static sendData(cb) {
        cb(null);
    }
}

--- 
+++ 
@@ -6,52 +6,10 @@
 
 class Data {
     static getData(cb) {
-        cb(null, {
-            sensitivity: {
-                strength: 0.7,
-                power: 3
-            },
-            thrusters: [
-                [
-                    0.0, -1.0,
-                    90.0, 1.0,
-                    180.0, 1.0,
-                    270.0, -1.0,
-                    360.0, -1.0
-                ],
-                [
-                    0.0, 1.0,
-                    90.0, -1.0,
-                    180.0, -1.0,
-                    270.0, 1.0,
-                    360.0, 1.0
-                ],
-                [
-                    0.0, 0.0,
-                    90.0, 1.0,
-                    180.0, 0.0,
-                    270.0, -1.0,
-                    360.0, 0.0
-                ],
-                [
-                    0.0, -1.0,
-                    90.0, -1.0,
-                    180.0, 1.0,
-                    270.0, 1.0,
-                    360.0, -1.0
-                ],
-                [
-                    0.0, 1.0,
-                    90.0, 1.0,
-                    180.0, -1.0,
-                    270.0, -1.0,
-                    360.0, 1.0
-                ]
-            ]
-        });
+        xhr.get('/api/settings', cb);
     }
 
-    static sendData(cb) {
-        cb(null);
+    static sendData(data, cb) {
+        xhr.put('/api/settings', data, cb);
     }
 }
Use XHR to get/send thruster settings
