I guess there's the performance difference in 1.6 and 1.7.10 to consider too. You need a beefier rig to handle the mods you could in 1.6.
But I have seen a lot of your posts for help and all the advice you get is for 1.7.10 mods and features introduced at that version. People are forgetting how 1.6 worked to the point where they can't help you without checking mod version history.
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