I'm a bit concerned about your numbers. The ratio seems too narrow, but it's easy enough to cross check.
The ratio between right and left tensions is equal to the ratios of CTF distances.
So, measure both with a ruler - 65 minus flange to frame, and compare. If all the numbers jive, your OK but still might to add some tension.
However, if the don't jive then your tension messurements are off and adding tension isn't optional.
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