Hi - I bought an Tigon kit 3 weeks ago and went to change my first coil yesterday. According to the instructions "coil replacement is just a case of unscrewing the base hardware" - however it is completely stuck and unable to be removed. looking at various websites i have tried: running under hot water, placing in the freezer, rubber bands, rubber gloves, tapping the base on a hard surface etc all to no avail!! This morning i tried again and the glass tank broke in my hand as i was trying to unscrew the base. I then decided it was time to use a lock wrench (with a layer of rubber to protect the finish)- however even this was unsuccessful!! Now i have a broken glass and the base is still stuck tight.