What i ended up doing was to get the four larger rings for my OF 1000 and since my OF 1400 came with the insert ring to take PC rings, i have a couple of sets of PC rings for that router. There are times when i have found it best to set up both routers. It sometimes takes some measuring and calculating to figure out how to work with both so the bits in each router work out, but it is doable.
Brice has shown us an excellent example in his pictorial on using the MFS 400 and 700 pattern templates in the how to section. If you read thru that, you will have a better idea of what you are doing. Also, you will find yourself much deeper into the SS (Slippery Slope)
Tinker