Yes you are right bro. what ever the Prime satellite is ,It is clear that we miss some thing on every sat as a side lnb. As Thaicm5 & Insat4A has a very little difference say 5* so I think we also lack some good hardware as combine scaler Ring for two sats + feed horns etc,As I am from small city so definitely it effects not having good satellite products.
About Thaicom5 I also have it as a side lnb but I required which freq. I am receiving them. Not all useful for me. Thanks