Sorry for the delay in responding.
So the smoke is black. I do not see any hint of blue and it is certainly not gray or white. Which would indicate to me that this is a fueling issue, correct me if I am wrong.
I replaced the injectors a while ago, unfortunately I did not checkout the pre-chamber all that closely. I may have a go at pulling them again, just need to get the crush washers.
After checking the timing, the delivery valve was leaking and I noticed that the o-rings (which I assume is just to keep crap out) was basically useless. So I ordered new crush washers and o-rings for the delivery valves. While I was in there I took a closer look around and just noticed something rather odd looking about the pistons in the IP. They all looked almost exactly the same, but it just didn't look like a nice cleanly machined part that I would have expected... Basically the top of all the pistons in the IP has a notch/cut out that just didn't look very clean. Took some pictures, let me know what you think
Not too sure where to go from here... Pulling the injectors to inspect the pre-chamber and dump some mystery in seems like as good a place to go as any.
Also If I didn't mention it earlier, I adjusted the timing back to about 26 degrees, looking at the smoke from the mirror while driving, it does not appear as though anything has changed. I may bring it in for an inspection just to get a baseline, but they aren't exactly cheap out here, $80+ each time last I went.
Pictures are here:
https://imgur.com/a/2VQ9hIF