My currents thoughts on it are:
We're just over 50,000 miles.
When the particle filter reports it's blocked I intend to remove it and try the caustic soda cleaning trick.
If that works great. When the low FAP fluid warning comes I'll add a couple of litres myself and live with the warning till I know the filter is ok.
I'll then pay and have the warning reset.
If that works for 10,000 more miles (approx 1 lire of FAP fluid) I'll add another 3 Litres and see what happens.
If the filter doesn't come good with a clean I will look at removing it and see if I can trick the pressure sensors into thinking it's there and ok.
I'll then let the FAP fluid run dry and just get the warning reset.
Basically I'll then be running the system without fluid or filter.
The question now is how long have I got till the FAP fluid or the filter give me a warning?