Mikey, I'm assuming you close with words. You refer here to trial close and close, but surely there must be something you say to the prospect. That is what I meant. What do you say that would actually be the close you refer to? If you mean by "close", asking for the order, how do you ask for the order?
If you will agree with me that closing is a matter of some words coming out of your mouth, and you are asking when those words should come out of your mouth--then it all falls into the category of saying the right thing at the right time. "Close" is just an esoteric label in selling. What do you say? If you can tell us, it would be easier to determine if those words are right and when is the right time to actually say them.
If you are willing to give some thought to that--and answer the question, I'll point something out to you that you may find interesting.