There is one thing no one has picked up on and emphasised yet, which in my opinion nails the whole 144 hours thing, and I’ve been waiting a couple of weeks to see if anyone would do so. To pass the time while waiting I’ve been arguing against ROG just to keep him copying and pasting like a mad thing, not because I believed him to be wrong but just because it amuses me.
I count extra points if he uses different colours. 
If you read the regulations it says:
A weekly rest period shall start no later than at the end of six 24-hour periods from the end of the previous weekly rest period.
And to me the most important words there, with regards to this whole debate, are
at the end of six 24-hour periods
This tells me they must indeed mean 144 hours, or 6 x 24 actual hours, because our weekly rest period starts when we finish work for the last time in our working week, not at the end of our last 24-hour period. Even if we did 3 days with 9 hours rest and 15 work + 3 days of 11 hours rest and 13 work our weekly rest still wouldn’t start at 144 hours from the end of our previous weekly rest, it would be either 135 hours or 133 hours depending if our 6th shift was a 13 or 15 hour one.
We don’t take a daily rest, then our weekly rest, we extend a daily rest into a weekly rest, the weekly rest begins when we finish the shift. If it didn’t and instead began at the end of the 24 hour period the shortest possible weekly rest would be 33 hours, 9 hours daily rest, which takes you to the end of the 24 hour period from starting work + 24 hours weekly rest. This isn’t the case as we know 24 hours counts as the minimum reduced weekly rest, not 33.
So those four little words - at the end of ©ROG - make all the difference and the end of 6x24 is indeed 144, so as long as you do not go past 144 hours you can squeeze in as many shifts as you can, while meeting the other requirements of the regulations such as daily rest periods and maximum driving hours. Without those four little words I would argue it was 6 shifts but with them I can’t, well not any more as I am getting bored with it and will see if I can set ROG off on something else instead now.

Well, that’s what I believe anyway but I still won’t be trying it over the water just yet.