Hi Rene,
In regards to:
<h3>OSPF NSSA ASBR and ABR</h3>
You say: “When an OSPF NSSA router is both ASBR and ABR then it can flood LSA type 7 or LSA type 5 directly in another area. For this reason, the P-bit will be disabled on type 7 LSAs.”
I feel i am missing something here.
When you make R2 both ABR and ASBR by redistributing R2’s loopback , you say the conversion from 7 to 5 does not happen.
But Still R1 gets the type 5 for the loopback from R2?
I mean, if the P bit is not set, then how can this redistributed loopback on R2 make it to R1 as a type5?
What i have seen after labing this up is that on R2, after the redistribution of its loopback, there is a Type 5 and a Type 7 LSA in R2’s database for its loopback.
Does this then mean that R2 just sends out the type5 it has to R1 and the type 7 to R4 (because its NSSA)for instance?
Lots of questions sorry for this! 
Great posts as always!