My process was:
#1: Fit hydrolics to feet (I had to widen the rear foot slightly)
#2: drop of glue in each rear footwell
#3: drop of glue in front footwell
#4: drop of glue on rear of ankle where hydrolics will meet
#5: put foot on flat surface, hold hydrolics from side with tweezers and fit into rear footwells, lay ankle in, using tweezers to align hydrolics.
#6: press gently down and back on ankle, to seat everything.
#7: Let dry overnight.
Then can put together the rest of the legs.