again, I feel like I am missing something

I've build myself a slice center tester to check if my readouts/conversions of the slice center informations are correct.
--begin-wire-patch--
1234.3ocyXk0aihDD9uRDOSG0WzzseybXo8gQ6pcVsuD4GHP6XTvfEGSR1Q9+9VM3CbrgXm3Y0ZmfwE0QWU8UUWs+oUbQdtNtNsHuxZxC+zZQYwJ3FrsUQS85lZq41V0E.EhsUZdKgM1ivF01pJKMVeDarSXieNsAlHVmWqK2yl64XSbh1jmiM5N1v64SrkOxQLxGlQ5QL5dJifr0kQ4UYQlPHvM7f7hDMDL+oE1bIpttL8wl5NRo4U0Q4wceo9s0ZqIV4MqdD7YaqeDk0.Db1rw15whl7jVtVpSeZYs0DI3PujlTuzZBgAA9Wslv4Pj8M3SkDDINKppyHIfVccEJWpvAoEjEHNMFijDZDBmDGg4ZWtifZrotrxrxmfa0PQ7yfr+HMQW.OLtHqnD99B3kHBiaI05A0a8FSP+fmzk426HOj2jkYelKyMd3xzjDMX3G1k6fHWzJiZ9tQM28a4V.WjaZLjh6EDUNsAQAW0FDIJ2gChLU.CwIdRjWneHhxbkX5LIKTM6+GAwSidKJLwO5owuGSqSzqMgf81LdYwQF05OhpiWdmWZ8cAsrBZZUDTYlFkgRRWoyq55XrWC8HdXoO2HFTMLlkl1T2tPK0UEYMsUQe3556o+i1HSan5JVONy+3RqsnBEm2hJDB1vnhPYnOhOi3gTXxTj+rY9DWd.yC69UQE6h18bo8jN3P36YLWpCWQHBAgvkXWaL7lLeWz4SArflZ5WQuKykBclepeMFcT.3epyS.tAVX2zRXBVbRxx38c0vb5vYKeGOBhKBbPxYvchoLtbJ2k64+kqgKMKyd9xhrhn5ixSbtTIwXLyQ4vbnDHOcao0lwM0EisJHTiLXr.6pDtLWiltozZwNKSieNWWUM5RAiUcuf7CWRcj12XZC0ezur.VZvy3mCWB8hQcq48q81ONzBZcYQrNooDJD2XegHYH0DGko+.M2EjF.1a1x+8vdGGmVXOinFF1qnTGDGBOHU.M.4LC.NgJtuOi8Ug8fiuzvvwoYZu7LLgHdt8.Wmuw9jc+5EcurNUkE0QuaWiS.a1aeOeWhXDlI1ae2Bk6Ma2m2KOON7uL5dQQ4JCLRby1ltCBGC.n5Qfjzq.5d86Le4HXIE2hfcj7gQvSotXDOPfQv9b9noRoGwKTvDpoeUD7iusN5nFUOVTzG4sHJqRaOv083WR+ZZ8q0MkZZxEhe2dNiOuB9nsoef.f4C+YDoXcTbZ8ajwaPKjJg.iITWJESb312XZ8VIzKqf7nSMrM0sM.bnt5uMo969V5qcSe3dZkEXgWN1fuzCHWk9TdWucyw9Pqhd85lvrmbWP6d5ACkl+4LDH2kZntlCWoUtjMEOXhpm0ubsVnUlKZuQywt+LojsRcoNgg8qOcrUpKyHmuGITobxIQjcmDg5NxIQTJXqcNlyQRZfOJfFhCX3fYtxvuZKxcn4Q2.TIv1NbyVdW1c8QuipXjQBTmvW28ma5hqe9DCzbz1jN1u6+CvsQML4dW3ELupfobHDBFRyDvv+Zoe.lNdT+bRiLp8+lmLzLSeKZso7T9q6GVi1VyQITw8Tt.qXtN6FP4dl.pAIJFblKf7vEidggSg4UXRjLLzAgC8lx88BvSCCu0+XQW2vBCLHZmNt62a5N7gYdulxtP4lM+KIEStnB
--end-wire-patch--
My patch is set to a resolution of 1920x1080 px ... this might work for me. But what if someone else uses one of my patches in his 3000x5000 px composition? The alignment of my center crosses then would be totally off.......
So my question: How should I build a patch to work with any resolution?
Best wishes
cosmowe