HumminGuru vs.Degritter

@rvpiano I would be more concerned with the accessibility of replacement parts. all of these machines will have the parts go. The ELF times are pretty short for most. 

@bondmanp the parts availability is not very good. I have had to do my own searching for replacement parts. 

Would also agree with @daveyf . The combination of US and vac has given me the best results both on listening tests and optically looking through a high powered microscope. 

@pryso I mix a few drops of photoflo with the US cleaning fluid to break the surface tension and help wet the surface. 

After US cleaning I use a dist water rinse and a vac machine as a final clean and dry step.