I don’t quite understand what you’re asking but maybe this will help…
As you seem to know, the reason for holding down the s. lk before completing the dp motion and pressing hp is to avoid negative edge causing Sak’s hop special to come out. The hold, while a good idea in my opinion, is not neccessary – if you’re timing is tight the dp will still come out without it.
Heres how I do it with double taps (press the button first with the middle finger and then with the index finger):
Double tap c. lk twice, double tap s. lk once and leave your index finger holding the button down, then press hp with your ring finger while still holding lk.