Seem to remember, if you want to stop the vibs after T/O, inspect all the main gear tyres, those that show uneven wear(low spots), replace and vibs will be better, replace the offending altn brake valve/s and problem should not come back.
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The wheels loose the random effect when said altn brake valve/s do not operate in correct fashion, often providing a lower pressure than is reqd and so lets the wheel stop at a hi-spot on the brake unit.
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Happy flying to all in 2007