The method we used was very easy(that easy know one in the group guessed, I was going down the clamp and surface table route!), hold two tubes together on the work bench and mark each end with a marker where they touch.
@Tango130 started
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The method we used was very easy(that easy know one in the group guessed, I was going down the clamp and surface table route!), hold two tubes together on the work bench and mark each end with a marker where they touch.