P1S PTC Heater Mount

It's getting colder and I was having a hard time keeping my P1S chamber warm to prevent warping of certain filaments like ABS and ASA.  I saw some chamber heaters online, but didn't want to spend that much for a simple heater so I decided to buy a cheap PTC heater and design a mount for it.

I decided to buy a 110V 200W PTC heater (link).  But there are several out there that look like the one below.  As long as it's rated the same and has the same dimensions, this mount should work.

I also purchased a simple thermostat to help maintain the temperature (link).  I've been using this for over a week now.  It is very effective, inexpensive and easy to install.

I didn't want to drill any holes, permanently modify my P1S, or take it apart, so I just ran the power lead and thermostat sensor wire through the gromet where the PTFE tube comes through the back and zip tied the connection to the back frame as shown below.

I may design a replacement grommet that can use that same hole.  I then located the thermostat sensor below the frame on the right upper side of the chamber using zip ties again.  

Make sure that position the sensor under the frame.  I found that it wasn't effective when I positioned it on top of the frame.  I may design a mount for the sensor in the future, but for now, the zip ties worked.  Below is a view of the routing I took, but there are other ways to run it as well.

I decide to secure the mount to the floor by using an M3x10mm screw and picking up the existing hole in this location.  Please note there is a notch in the bottom of the mount that will help locate it as well.  I also designed this to pull air from above and direct it down against the ramp to distribute the heat.  It's not as elaborate as some of the other options out there, but it's cheap and effective! 

Please let me know if there are any questions or suggestions to improve the design. Happy printing!