Re: bonham fill
the part on stairway
16th note triplet Snare, 16th note triplet high tom, 16th note low tom, 8th note kick, repeat three times, then the last one just backwards.
The pattern isn't hard, it the 5 against 4 part that might be throwing you, you put 5 of those patterns into the space of 4 beats.
Its not hard, but its REALLY hard to make your kit sound like Bonham's.