It's not always helpful to post on multiple forms simultaneously. Learners generally think that it means they'll get a helpful range of opinions. However, what we find is that responses here might say one thing and we then get bombarded with "Oh, but over at XXXXX.com they said ...".
We recommend posting a question on one forum only initially. If you do not get a satisfactory answer from that forum and you feel that you have exhausted its possibilities, then of course trying a different forum might help. It is only courteous however, to tell the second forum that you have already asked the question on another forum and then give a precis of the answers you received there, along with an explanation of why you are now looking elsewhere.