i am unable to do your HIT because i am not a master, but i did want to say that i very much appreciate any requester willing to take the time to seek out worker forums, engage with workers, etc. it is especially appreciated when people like you are so friendly and open to listening to worker feedback and then further educating yourself on the information given. this is an extreme rarity (some requesters wont even message/e-mail back), and as a worker, it is amazing to see. thank you for your time, your openness and your understanding!
it seems to me that you are looking to have this HIT of yours completed fairly urgently. just a heads up that things like this posted with the masters restriction tend to linger a little longer. i think you will notice quite the difference when you post your next one for non-masters and see how quickly it is completed.
oh, and welcome!