I have a Humax 5400Z (patched) model and a twin Lnb (Cambridge 0.7).How much difference will an LNB with a lower rating such as 0.5 or less make on the signal strength and quality. Now my signal strength is 42% and the quality is 22%. My dish is 1.2 m and is alligned to Astra 19.2 E. I live in Cyprus. Sometimes when the weather is bad I lose the signal. Is it better to change the LNB or get a bigger dish?