can anyone attest to the femtech wine thief?? I have 6.5 gallon glass carboys and my baster is too short to reach beer for sampling. Did try to lenghten it with tubing but wont pull enough -- had to go in and out of carboy many times to get enough for hydro tube. The femtech has these prongs on end?? - is that what activates it or is the finger on open top the concept?? Not too interested in pushing through trub/yeast cake at bottom of carboy to activate prongs to get sample??? any help appreciated, doc