Urine Test with QuickFix

Hey guys
 
Ive been a ghost on these forums for quite some while now. This is my first post as a new member! just have a couple of questions.
 
Anyways, I smoke daily and have a pre-employment drug test coming up. I have QuickFix 6.0 ordered from urineluck.com. I actually wanted the new 6.1 but i called spectrum labs and they told me the only difference between 6.0 and 6.1 is the box. I verified the batch number and they told me its good until August 2016
 
My question to you all: what is the best way to take the quickfix inside with you? I am thinking about just putting on some compression shorts and having it tucked in there. I have walked around with the bottle in tact by my junk and everything seemed ok. However, i am just nervous about putting it in there with the heat pad. My main concern is getting the temperature right. Anyone have any problems temperature? 
 
Second question: i ordered quick fix because my friend swore by it and i have read plenty of success stories on these forums. however, i am STILL nervous about using it. would it be smarter to empty out the quick fix bottle and just have a friend's CLEAN piss in the bottle instead? basically do everything the same way i would with quickfix (bottle, heating pad, temp strip) however the only difference being that instead of fake piss in the bottle, it is actually CLEAN piss. Would this be a safer option? Can I just have my friend piss like an hour before i go into the test and keep it warm with the heating pad? Anyone see any problems with this?
 
Third question: my test will be in Houston, TX. I have read success stories on these forums for people taking their tests at Labcorp, Quest Diagnostics and some other companies. However the company administrating my test is called Asurint (I am not sure about this... another name in my email confirmation is eScreen) I have never heard of Asurint or eScreen until I received my testing info. Anyone been tested by Asurint / eScreen? 
 
Thanks for reading