diff --git a/src/example/example1.js b/src/example/example1.js
index 99997d6..61d0d16 100644
--- a/src/example/example1.js
+++ b/src/example/example1.js
@@ -182,29 +182,24 @@ export default {
           }
         },
         {
-          id: '3ExXFSuV9WB2WMY2Quyq6L', t: 'measure', v: true,
+          id: 'm1', t: 'measure', v: true,
           tf: [[0, 0, 0], [90, 0, 0], [0.1, 0.1, 0.1]],
-          dt: { in: [], out: [], center: ['4YZKo6XtvL2migaIUmakAr', '7Ik2sRdDZy8Q6sC00AaqCv'] }
+          dt: { in: [], out: [], center: ['m2', 'm4'] }
         },
         {
-          id: '3ExXFSuV9WB2WMY2Quyq6L', t: 'measure', v: true,
-          tf: [[0, 0, 0], [90, 0, 0], [0.1, 0.1, 0.1]],
-          dt: { in: [], out: [], center: ['4YZKo6XtvL2migaIUmakAr', '7Ik2sRdDZy8Q6sC00AaqCv'] }
-        },
-        {
-          id: '4YZKo6XtvL2migaIUmakAr', t: 'measure', v: true,
+          id: 'm2', t: 'measure', v: true,
           tf: [[8.4, 0, 0], [90, 0, 0], [0.1, 0.1, 0.1]],
-          dt: { in: [], out: [], center: ['3ExXFSuV9WB2WMY2Quyq6L', '3cdb6OHkp132soSsgW8McA'] }
+          dt: { in: [], out: [], center: ['m1', 'm3'] }
         },
         {
-          id: '3cdb6OHkp132soSsgW8McA', t: 'measure', v: true,
+          id: 'm3', t: 'measure', v: true,
           tf: [[8.4, 0, 9], [90, 0, 0], [0.1, 0.1, 0.1]],
-          dt: { in: [], out: [], center: ['4YZKo6XtvL2migaIUmakAr', '7Ik2sRdDZy8Q6sC00AaqCv'] }
+          dt: { in: [], out: [], center: ['m2', 'm4'] }
         },
         {
-          id: '7Ik2sRdDZy8Q6sC00AaqCv', t: 'measure', v: true,
+          id: 'm4', t: 'measure', v: true,
           tf: [[0, 0, 9], [90, 0, 0], [0.1, 0.1, 0.1]],
-          dt: { in: [], out: [], center: ['3cdb6OHkp132soSsgW8McA', '3ExXFSuV9WB2WMY2Quyq6L'] }
+          dt: { in: [], out: [], center: ['m3', 'm1'] }
         },
         {
           id: '1', t: 'way', v: true,