After buying literally hundreds of items, I have all but stopped buying parts from Huztl/Machinesdoctor since they wouldn't do anything about an MS660 case they sent me that had corrosion on it. They insisted it was just "lacquer" overspray and not corrosion. Even though I tried patiently explaining to them that being a licensed aircraft mechanic for more than 30 years I was qualified and experienced enough to be able to tell the difference between corrosion and overspray. They insisted I try wiping it off with some solvent which I finally tried, just to appease them, and of course it didn't do anything. (and I knew it wouldn't) Long story short, nothing ever happened with it. They stuck to their overspray story and I put the part on the shelf where it still is. What I wanted was for them to get the part back so their engineers could figure out how it got corroded in the first place and how to keep it from happening again. And then to send me one that wasn't corroded. By the time I spent all the time communicating, taking and sending pictures, having additional online discussions, trying their solvent wipe down, etc. I would have been better off just putting it in the scrap bin from the start. I think that is their motive lately, ie, just wear the person down to where they say, "Ah, heck with it" and move on. Early on, I had excellent customer service from them but it gradually deteriorated to the point where I no longer will buy from them except on the rare occasion.