I have an MES 40 that has the small half tube chip loader on one side. How often do you add wood for smoke? With a full tube, I seem to see 45ish minutes of visible smoke through the window. Do you add every hour or so? Is this really a taste thing? Has anyone tried using chunks split down to a size that will fit in the tube instead of chips? Seems to me that would give me a longer smoke? Thanks!