50 to 70 is kind of unusual to me but just make sure the screws are secure and not at the end of the thread ,I wouldn't want to see it fly apart on you .I'm sure once you start using it next season a new bow will be in order hahaha
Myself I would definetly go to a release aid and a knock string,my bow has burger button's and I attach directly to my serving.
I use a bear claw from true fire ,I find you need to be comfortable with the trigger more than anything and a small jaw .This is just what I feel comfortable with you might not like it yourself,There's lot's of good releases out there you'll just have to try some and see which feel's the best to you .I want to try a rope releasejust because the head is loose I don't like the one's that come on the end of a long shaft .The one I'm using now is a glove and i didn't like it at first but now I do .The thing with the glove is that you need to make sure that it fit's properly or it will keep sliding down your hand when you draw back . I'm glad I could help and if I can help you again just let me know .

nubo
John Edwards