I just got the Taylor k-1766 kit for testing the salt in my water. Is there any reason why I shouldn't just use the sample tube from my k2006 kit when testing for salt? Even the instructions that came with the k-2006 say to use the 1766 sample tube (part #9198) but as long as I rinse the 2006 tube is there a risk of contamination or something? It would nice to have everything in one nice, neat k-2006 box.