stock windage tray installation question

Thnks for the info Marco. Mine initially was touching the block (with just one washer on each stud), but I was also wondering if this also might cause a rattle in the engine? And if you say, "just touching" this might cause a rattle in the engine - possibly ? I know it shouldn't as it is part of the engine as such, but I could see the sides flexing a little, perhaps causing a chatter.