Anyone have any experience with these A1943/C5200 PCBs?

[x86guru]

Does anyone have any experience with these A1943/C5200 PCBs? With the exception of the single pair, the double, tripple, and quad pair boards all basically function the same with the exception of the final output stage. I also provided a schematic of the PCB with a double pair. Sorry for the lousy schematic, I just hacked it together as fast as I could based on the PCB itself as one wasn't supplied. Also, for the diodes and smaller transistors, ignore the part numbers in the middle -- I didn't have models for those parts so I just grabbed generic parts and then added a label for the actual part.

Let me know what you guys think of these.

 

[x86guru]

Here is a better schematic and some scope triggers with a 750 mVPP input as well as a 1V PP. The 1V PP clips; but the 750 mVPP seems to look good.