Mine is similar to the Dot Line (I'm not surprised if they came from the same factory). It works fine.
The Pentax solution is the best. But I agree that it's too expensive. I also have the Pentax solution, only because it was part of a package I bought used.
See
this thread.
The two Pentax adapters in questions are different.
This is the 31046:
I can't find images for the 31022, but I think its bottom has the same contacts as a flash mount. With the 31022 attached to the camera's hotshoe, you can have a flash on top of the 31022, and a remote flash via the cord. The 31046 is for the remote flash only.