I've attached a mark-up of your photo below. I've circled the solder joints that I would recommend checking. The one that looks the most concerning to me is the one in the middle of the board. Though it's hard to tell from the photo, it looks to me as if you might have stripped off the end of that solder trace on the board while removing the original components (assuming that that is where one of the mod components went). If so, then the new component(s) probably aren't connected to the circuit; you can check this by testing for continuity with a multimeter, if you are able to do that. The fix is easy, though--just solder a piece of wire or trimmed component lead from the circled solder joint down to the adjacent joint to the lower right on that same trace, as shown in yellow on the mark-up below.
It's probably worth your time to just go through and re-flow the solder joints for
all the components you changed for the mod, just to make sure you have solid connections.
Attachment:
DS1_PCB_triplewreck_mod.jpg
Thanks for your help. I unsoldered some of the sloppy solder joint and I think your correct. I may have removed the trace while removing components. I’m gonna play with it and see what I can come up with.