Hi, I have purchased viariable rate fert spreader, will be doing soil analysis after the harvest and do other things that can save me some money/ improve yields. In my opinion, all this is pretty useless without a combine that can track and record yields in the field and in its' problematic/good pats. I don't have funds for newer combine and likely will not have in near future, so I suppose I could install a yield meter in order to get what I want. I know trimble has got one, but it is pretty dear. Any suggestions for cheaper alternatives?