I think the smt service is great, however I am finding it quiet frustrating when I have a working board and want to order, only to find the component has disappeared from the parts catalog, so I contact you and am told there is no equivalent and no idea when you will get them, I then order the part from lcsc and install myself only to find the part has reappeared a week later, I notice this week you added the esp8266 12f module to the catalog and now have gone from 2000 in stock to 0  with no intention to restock, no guarantee to restock etc, if you are part of lcsc how is it possible you are unable to get the parts I need on my board when I am able to from lcsc directly, It would be great if you could have a better and more reliable parts catalog for smt, even if you can back order would be great to have the option to wait a few days for the parts to be prepared before production Thanks