Toffee, take it from me you will never get that bracket 100% unless you take it to a forge and using my pic they create the holding groove. I am at a dead end with you now and to explain 1% ( degree) out on earth means you miss a satellite by 65 miles in space. You may get a signal but it will be tiny. With the size of your dish you should get 100% on lots of sats. You have spent £60.00 on a meter, £170 on that new box, which may test you initially, so a few more quid should not put you off. Here is a link to ad for motor £35.00, its in uk so postage will be small. they are open to offers and its brand new. go for it.
I'll look back in a few weeks when you are sorted.
I'll look back in a few weeks when you are sorted.