You gotta break it down. Practice your sprints. Drill those mini 10 foot dashes. It's the only way your going to feel comfortable with the straight blast. I mean it doesn't really matter which way you do it as long as it works for you. But you can always improve on things, ya know. As long as you put pressure down that person's center line it's all good.
You said you like straight blasting off the persons jab when they retract it? Have you been working your entry's? Destroying the jab or intercepting with a jab or thigh kick of your own before going into the blast?
"Poor is the pupil who
does not surpass his
master" - Leonardo Da