CIS injector,question.(KV engine-K-jet)

[BIGGYIN]

Had a dry run on my blue q90,getting an injector out.
Soaked the injector seat with WD40 and had a coffee.Using a brake-line spanner,I twisted it abit and kept soaking it with WD40.Got a pair of long nosed bent pliers and carefully,prised it out.
Got it out and gave it a clean.Looking at the actual injector,it has 2 seals.(1xsmall+1xlarge.)
Is the larger seal surposed to be soft rubber or hard?My was hard,but I don't know if 20 odd years of heat,has hardened it?
I notice the seat,was left in the head.How do you get the seat,out of the head?Haven't done any research(Vagcat.com,down) and I thought it would be good info,for other members on here.
How many seals are there,in all?(Each,seat and injector.)
Want to get this all sorted,before I have ago on my red q90.
Thanks.