Nozzles and EGR

[Sorin]

Hello

This week-end i was working on my 300sd
I changed the nozzles and blocked the EGR valve (for track testing...)

I put everything back togheter but my fuel return lines leak a bit of diesel
can i simply remove them and block the return on the injectors ?
did i miss something when i put them back ?

for the egr can someone tell me where the little line goes ?
(the one on top of the EGR valve)

should i see some improvments in performance or economy ?
or only less smoke from the egr ?

My old nozzles seemed cooked on the inside is that normal or something went wrong with the previous owner ?
i changed the nozzles on my Jetta 2001 at 100k for bigger ones and the tip wasn't that messy.

my 300sd has 414k km

next big job:valve clearence