we purchased a johnson grain saver for one of our platforms, after removing all the bolts from our platform to install i thought there has to be a simpler way, and cheaper.  Found a cheaper and simpler way...use either a 1.5 or 2 inch thick wall pvc pipe and cut it into 5 foot sections have it set behind the sickle on top of the deck sheet, only need two brackets per 5 foot section.  Cost is only $35 and 1.5 hrs. to put on.  we took our johnson grainsaver off, and have the pipe on both platforms.  any questions on how to build let me know.