Try our re-instated info resource - "Aladdin's Cave" (Main menu)- sorry it's taken so long to fix
First off Neil, there is no need to drain the oil. Just rest the bike on it's side stand. That should be enough for the oil to drain to the left side and removal of the clutch cover will be ok. You may lose a little oil but you'd lose the same or more draining the oil. Did you by any chance move the lever when the clutch cover was off. It operates on a cam and moving it can cause the large compressor lever to go past the cams biggest point and it flicks out. This means it doesn't matter what the outer lever does, it won't work. You need to remove the cover and refit the cam in the proper position. It's easier to do than describe TBH. I presume you remembered the bar bell shaped metal piece when fitting the clutch?
The screw moves the end of the big arm in or out so when it pivots on the pushrod it alters where the other end touches the cam and therefore where the arm rests.It all has to be assembled before screw movement makes any difference
Looks like its ok to me