the thing is my unit goes right into the corner of two walls,and instead of purchasing two stands which would cost another 60 quid i was wondering if i could use the remaining two brackets ,one on either side of the tv,however i have noticed that the rear fixing plate of the bracket is dead straight! So is there something i could stick to the wall first,and then attach my speakers to,so that they both face where i sit[facing me] ,as i have a feeling that the brackets do not swivel either,am i right?