In the early days of Sky Digital (Oct 98) I decided to upgrade, so I realigned my dish, new universial LNB and set the skew. (if you recall, there was an anlogue transponder at the time). Sky guy arrived and was very happy, just pluged in and away it went. 10 years later I have never had a problem, never lost signal, and the same dish is still there good as new, now feeds Sky HD. (differant LNB)