My M1008 has not been wanting to start since the temps dropped into the 30's. I haven't checked the glow plugs yet, but I was able to fire it up last night. This morning is a different story, it barely will crank over and then almost kills the battery. What say ye of this magnetic block heater? http://www.tractorpartsinc.com/magnetic_block_heaters_mh1153_3953_prd1.htm Also should I even bother getting a battery warmer?