Update-Test Report
Ordered the package of 50 lids, 200 mixing cups, that came with 50 storage lids. Also ordered 3 adapters; no.2 for a Genesi, no.6 for Sata 5000, and no.7 for Walcom FX.
First issue the no.7 adapter had the wrong threads, it's threaded 12mm X 1.5mm pitch and all the Walcoms are 12mm X 1.0mm pitch. The seller did address the problem, thanked me for the information that they said would inform the manufacturer, and credited my account. Otherwise the adapters are made nicely from stainless.
So I have a cup and a lid on the bench (no paint) playing with snapping the lid on to the cup. On about the 3rd or 4th time the sides of the cup split from top to bottom. No excessive force, just enough to make the seal. Imagine that happening on the mixing bench full of paint!
Used the first set up for a small amount of epoxy sealer worked OK. Putting the gun/adapter onto the lid was no problem. Next was base, when I inverted the gun to spray the little vent valve in the lid pissed paint straight down all over the gun, my hand (thank God for gloves!) and dripped on the work. I made a save and replaced the lid, did it again. 3rd lid got me through the base.
Next cup and lid for clear functioned fine for spraying. Put the cup with a small amout left over clear aside, went out and when I returned in about 5 hours the bottom of the cup split right across the middle and leaked onto the bench.
Used the system one more time for 2nd final flow coat of clear and it worked OK.
Conclusion
The product can't be trusted and I can not recommend them. I would have to have used at least most of 50 lids and cups with zero issues before I could say with caution they were OK. I'll use up the remaining lid/cup set-ups on non critical work and the excess cups for mixing only and I'm done with this product