Yes Cory, in my view that would be an excellent way to approach that manifesting method - and, indeed, your life in general.

Trying to force yourself to "Let Go" of something without focusing on something else to replace it is a pretty tough way to live anyway because you can never turn off your focusing mechanism - so the idea of trying to not focus on something simply goes against what that mechanism was intended to do. No wonder people find it difficult :)

At the end of that manifesting experiment, I slipped in the following suggestion - basically for the reasons you are highlighting:

Finally, just something to consider in case you haven't realized it yet...there is nothing to stop you from putting an unlimited number of requests into the box about anything.

In fact, you can turn this method into quite a systematic on-going process where you daily make notes of things you want in your life (as you think of them) and then later (over a period of days) write requests for each one and put each one in the box when you feel it is ready.

You'll end up with a steady stream of requests going into the box, and a steady stream of manifestations and vibrational matches coming from the box.

And this means that eventually (as you become proficient with this process) you can spend your life mostly doing things you enjoy doing and leave everything else to The Box to sort out for you. :)

From: Manifesting Experiment 1 - Update 1

I would say that constantly turning your attention to new desires that bubble up is really "in sync" with how we wanted to live our physical lives before we incarnated anyway.

I don't believe any of us ever intended to get hung up on what we hoped to perceive with our physical senses (i.e. physically manifest) but instead, we wanted to seek out the thrill and joy of constantly realigning our broader and physical selves using an endless procession of new desires as a focusing "excuse".

And through that realigning process, "life force" comes flooding through us making us feel truly incredibly alive...the ultimate sensation you can experience on the physical plane.

And, ironically, if we didn't get so hung up on constantly focusing on the absence of the physical manifestation for an existing desire, we'd get those physical manifestations too as a natural by-product.

EDIT

I just wanted to add to this answer to say that having an endless stream of requests, large and small (inspired from an endless stream of desires), is really one of the best ways you'll figure out for yourself how "manifesting" works in your life.

Every month or so, you can review the requests in the box and see what has manifested in your life, or brought forward vibrational matches, and what hasn't. There should be too many requests in there to keep you "hung up" on any particular one. And with some self-examination about your feelings and attitudes regarding what has come into your life and what hasn't, you'll start to notice patterns about what works for you and what doesn't.

Then you'll start to make the principles real for yourself.

That's all I do...test, test, test.

The Manifesting Box is just a tool...a quantifiable focusing point...a physical externalization of an attitude of "Focus and Allow"

And it can be used for so much more than just slipping the single, biggest, most important (and often most resistance laden!) request of your life into it and then hoping for the best :)

While that approach grabs people's attentions and gets them to at least try it and get some kind of result, and thereby makes them realize that they have more power over their lives than they previously believed, I would say that a more valuable use of the Box would be as a practice and testing area.

My own insights into these manifesting ideas (beyond what I've learned from Abraham) come mostly from my own experiences with getting (or not getting) what I want. And you can't really do that unless you have lots of desires/requests to play with.

I went and sat in Abraham's question-asking "hot-seat" back in the early 2000's and our discussion came around to how some of those in past ancient civilizations on Earth were able to manifest seemingly "impossible" things like levitating massive pyramid stones.

Abraham explained to me that those people figured it out through "trial and error". They offered certain thoughts, saw how the Universe responded to those, and then offered other thoughts, and saw how the Universe responded to those. Eventually, they started to fine-tune their offerings of thought.

That little insight from Abraham constantly drives my own testing and tweaking of these manifesting ideas, and I've gained (and am gaining) many insights into these ideas from that experimental approach.

If you (or anyone else) is thinking about going down that route yourself through utilizing large numbers of requests or focused desires, I can highly recommend it.

And you'll have the side-benefit of getting lots of "what you want" along the way :)