POWERTEC 70244 4" x 20' PVC Dust Collect

This product (and the matching Powertec thread hose adapters/couplers) would be a great product if one could use it as intended. This is supposed to allow screwing spiral-threaded adapters onto them for a clamp-free retention. So, I bought multiple sections of this Powertec 3" hose along with some Powertec 4" to 3" threaded adapters. But, guess what? The adapter is right-hand threaded, while the hose is left-hand threaded! [Further, different product pictures on this page shows differently threaded hose. One shows right-handed threads (the picture I used to confirm compatability), while another picture shows left-handed threads (like the actual product as, and like the picture I didn't view)!] How stupid can a manufacturer be to make what should be complimentary products with opposing threads? So, I guess these products are gonna get boxed back up and returned due to incompatibility. A purely ridiculous lack of proper product design oversight. Way to go, Powertec! Thanks for wasting my time!