yes, what thickness tubing do you have and what formulation (R-1000? R-3603?) i ask becuase R-1000 is much softer than R-3603 and silicone....the shore rating for R-3603 is slightly higher than silicone also (which means it isnt as soft / flexible).
maybe you're clamping too hard? :shrug: just tighten it until its snug, dont muscle it on.
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