Yeah I'm just trying to get it working with what I have. I ordered a DreamSoucre DSLogic U3Pro32 Friday.
But hey I got it working, it really was that the PCI-E connector was a few tenths of a mm too thick, with the added solder/wires. The contact is still not great, not every time anyways.
Here a picture of some audio channel, and volume control data, that I'm bare-metal coding onto an ATtiny13A, to fix my stereo.
And here's a 3.3V 25MHz square wave from my SDG2142X, either triggered from CH2 or D7, which is the farthest from the data probe GND pin.
And my CH2 scope probe has the big long GND lead, and I'm just clipped on a few cm away from the series 360R resistor I probed, before it enters the scope. So the signal's probably a bit better than it looks.