Sadly all good in hindsight.
As I said before; "You don't know what you don't know until you get there, and often then its far too late"
Not so. By and large one of the best uses of these diving forums, is to be able to get good quality advise with robust response from guy's on the ground without the gloss and polish you get from the web sites.
And from the sales folk, distributors, dive shops, and other hangers on all trying to make a buck with sales advertising.
I think if you had raised the question earlier most of us here would have warned you off going direct to China.
Now I would advise you against your comment: "to contact Coltri to see if they are interested" reason being there not.
Look the original manufacturer Coltri knows all to well about these products, the reason nothing is done to stop them is perversely it's in there interest not to.
Coltri is well known but not the best of the best when it comes to compressors they as others know that all to well, however to you the customer you don't.
So by "allowing in" if you will a few "Chinese copies" to get out in the field perversely by comparison it makes there original poor product look better.
Comparing impossible chinese rubbish with the original but poorer Italian quality kind of works in a way.
You see my point. Iain