So good to hear that they may add all the pending HD channels soon i am also eagerly waiting for the addition of those channels and what about broadcaster packs price reduction any latest info on that
That should be "your judgement". Nobody can answer that. Not even a TS official. It all depends on the everyday wear and tear. If you feel it is good enough then it's not time to change. If you feel it's rusted enough and it's lifetime is over, then change it. There's no defined time period for these things. Neither there will be a useful answer on social sites. Because the situation changes for everyone. So take your call.
The steel thingy is rigid and solid. So it stops all the signal that falls on it and reflects it back. When you use wooden basket, because of the holes in that half of the signal will pass through it. You will get only half reflected back. Hope now you got your answer. Only you can imagine these choppy choppy questions.