Abeam the 2nm final point, extend landing flap, begin base turn and commence descent.
Not me (or my SOPs). Setting landing flaps and turning at the same time will take a fair bit of power to remain on path. Since your eyes will also be be busy looking for the RW, you're likely to end up low. When the PAPIs come in sight and you realise you're low, you're looking at even more power. Which means your transition to final correct path will take a pretty big power change again.
I say wait for landing flaps until you can see the PAPIs and you're happy with your path. Whether you use flaps 25 before turning base is up to you or your SOPs. I quite like it but company recently said we don't need to bother with it.
pigdog, I ain't saying you can't do it that way (I'm sure you do it very well), but it's best to keep it easy for someone new to the type.
P