I have a question on the Block Heater. I had the dealer install one on my L3560HSTC and he told me to get a plug in timer and set it so it will warm the engine before I go to take it out during cold weather, my neighbor said he has a SkidSteer and he just plugs it in and leaves it that way until he needs it. Is there any problem in leaving it plugged in during cold weather so I can use it when I want or should I use the timer??