 we watch the we've been through this training where you you uh you see different manufacturers ventilation installed and they're not all equal and they're not all balanced they're not all proper and it's called a smokehouse where you see it's clear you put the smoke in there you show different ones where it shows where it comes in and goes out better and it's balanced and it doesn't get over here so once you've been through that training you can actually see the air flowing with smoke that's smart then you start to say okay i get it i believe the science now and understand and i'm convinced