The 2388 equals an R62 in capacity. And the R52 by specs is almost 50% less capacity than the R62. So you will have no increase in capacity, or little at best. You will be running 2 motors instead of 1. Unless you need to have 2 machines running at the same time, Gleaners are a 2 hr changeover from corn to beans, you will not be accomplishing anything. Now if you take the time and money to Hyperize those R52's where capacity is increased to much closer to a stock R62, I wouldn't even think about the deal. Or simpler put, a 2388 runs a 12 row head easily as does the stock R62, the stock R52 is max'd out on an 8 row head and more comfortable on a 6 row head. Neighbors 2388 is just slower than my Hyper'd N6 with the same size head and his STS is one of JD's bigger jokes(3 yrs old now) as the 2388 does 75% of his harvest. Uncles 2388 doesn't clean as well as my Gleaner, but that can be operator settings.