I have covered every potential scenario you describe with examples, in 20 lines. You have not found any inconsistency/error in the calculations and the premises/circumstances are the same for all the possible events.
Yet you keep altering the circumstances more and more, and describe potential problems that may be “potential downsides” but fail to prove your points with a comparable example between outcomes.
I am going to make a last example applying your last “potential downside”:
I hope you notice this is a change in circumstances/premises which leads us to another outcome with or without DR.
Another 10k decline occurs: We only have 50k in DR, no BTC left. Since we still have a DR contractor, buy side have a buffer of +50k. With the decline it is now +40k in buy side. We ask DR contractor 10k. Contractor defaults. We now have +40k buy side buffer. Bonus outcome: We need that $40k back in BTC to pay for something. No problem. Just dump 40k NBT and you will get the $40k in BTC in T4. Walls then will be totally balanced, no buffer. Everyone’s square.
Another 10k decline occurs: We pay for that with T4, T4 is now $40k in BTC.
Another 10k decline occurs: We have no money, we have to sell NSR before PEG breaks. The moment NSR sale should start is just when the first decline of 50k demand starts, and we notice the limit of 15% have been reached.
Another 10k decline occurs: We have no money, we have to sell NSR before PEG breaks. The moment NSR sale should start is just when the first decline of 50k demand starts, and we notice the limit of 15% have been reached.
As you notice we have the same money, and the same time to make the NSR sale.
If you don’t do a effort to prove your points before saying them out loud, then we have no way of moving forward.
I will now stop considering “potential downsides” if there is not, at least, two examples. One using DR and one without using it, showing the same premises/circumstances, and showing different outcomes.