First I want to compliment everyone here on being such a insightful and helpful group, not often one finds such a quick responses and helpful insights so thank you very very much to everyone, it actual makes the situation slightly bearable.
So the modifier was added today however I wish I had read these response sooner, as the whole bottle was added per instructions from service. I've now run the 299d3 for about 4+hrs and it seems to be slightly less obnoxious with respect to pump noise however the chatter issue remains (I question why CAT doesn't simply add this 1U-9891 additive during manufacturing if it helps these larger builds).
They've requested I run the machine for 20hrs and bring it to them and they will give it a "full system evaluation" and that "Cat has agreed to offer a loaner during this time and support your operations. We can then ensure the additive has properly made its way through the system and evaluate the machine." Thankfully my original salesman stepped in and said they would come pick the unit up and drop off a loaner.
When asked what if the additive does not correct the issue, they are unwilling to commit to anything yet. I hesitate to let them take the unit as every time the local service folks touch the machine the results are more issues and a the equipment being a filthy mess... i.e., debris seals knocked off, put on backwards, loose drain plugs, oil spills, and my favorite one finding a tech working on my 306 Mini when he was supposed to be here working on the 299... they don't even know what equipment they are supposed to be working on, it's so bad it's nearly comical, if I didn't have so much invested in this thing, I'd laugh.
Hoping they didn't overdue it with the additive and also assuming/hoping this won't effect my brush cutter or other hydraulic attachments? Last thing I need is more problems. Will report back as I run the machine more this weekend to hit my required 20hr running with the CAT miracle oil additive. And Again, thanks everyone for taking the time to offer insights and suggestions my blood pressure is slightly lower now.