IH drills

Last fall I finally bought a two drill hitch. A hydraulic one. It is a Waldon. The Drills are both International the older one the 510 is a 16x8inch and the 5100 is a 20x8 and the 510 is a single disc and the 5100 double disc. The 510 and 5100s are the same drills basically. The 5100s replaced the 510s. They drill exactly the same. No sense in running an 80 horse tractor and pulling one drill. My 930 pulls both drills like there is nothing hooked to it.