Well, count me among the frustrated Carvex owners.
I have adjusted the blade guide and checked it several times, but the blade will randomly bounce around. (Of course, there may be some recurring factor, but I haven't figured it out.)
The frustrating part is that the blade will bounce around when I am pushing forward through wood. I figured that at least once I began a cut, the blade would get pinned in the guide, but that isn't always the case.
As I mentioned, I mostly use the jigsaw to cut curves, but some curves approximate straight lines and I terminate some curves with a square cut, like when the curve of a cabinet base ends inside the edge of the board rather than continuing until it exits the board.
I bought some grub screws, and I guess I will have to try to apply the fix, but that is not what I want to spend time and energy on.