Help! I am new at growing peppers and everything I read says that heat for starting seedlings is a great thing to do. Is it? If so, where do get the constant source of heat? I bought a heating coil, but it can't come in contact with ANYTHING and requires that I build a big wooden soil bed just to set the starting tray in. I was hoping for a simpler solution. I saw a rubber heat pad in a Burpee's catalog ... any info on if this works? Thanks for the help, Brad