Yes, yes, that's a great. That's a great question. So I think what we saw early on, and I'm, I think we talked about this, on some previous calls, is that initially, clinics that opted out, it was often because the control launch program is what or was for them too burdensome, meaning that, in the control launch we require a lot of work of the clinic in the form of data collection, because surveys, the physician does survey patients do surveys, we collected a lot of data in the clinic itself from the staff, kind of as they're working through the control launch program. And that's, that's, as we said, is in exchange for credits that they can use to purchase the system. So, so early on, a number of the clinics opted out. And we see this also a little bit recently, simply because they were, their expectations in terms of how much work would be required. We're not sort of aligned with how much time they had and how much they wanted to invest in a new technology like this. So they just simply were a bit overwhelmed by the requirements of the control launch and just said, it's not a good time for them, that maybe they don't have the staff to support it. And they, and they would like to, perhaps circle back when the CellFX System is available commercially, and not in the control launch. So I would say that's a significant portion of it. I think the other thing we've learned through the control launches that, not all clinics. And I alluded to this a little bit in the prepared remarks is that any, not all clinics have the right makeup for the CellFX today. So by makeup, I mean, kind of mix of cosmetic and medical DERM procedures going on. So as an example, if the clinic is a 100%, cosmetic, in one of our leading indications these days is non-cutaneous words, they may not see a lot of work patients, and really may not appreciate the value of treating work patients in that setting. And so I think we've had some that felt like, their patient and procedure mix just wasn't aligned with this idea of treating benign lesions. And in terms of where we're at. And so, I think it helped us refine the clinics that, we think are the appropriate targets. And that's just, just an example, I think of a couple of those situations that have happened.