I made this myself, and itīs been on for a month now working great, even with the temperature drops in the past week. But i was wondering if a really need to use the grill, or it will be better to place the tubs on top of the bottles. From the flex to the grill theres 20cm and from the tub to the top 4cm. I think it will work either way, but...just wondering . :D
http://3.bp.blogspot.com/-z2QxVoJV8w...-18-13_742.jpg