Stretching is a big part of gaining length imo. Jelqing at lower levels as stated earlier (20-40%) I find also is more helpful in gaining length then say at 60-80%. Your stretching seems fine, as long as your member can handle 30 second holds. I wouldn’t totally rule out girth exercises as girth can be one of the most important factors to how a woman reacts when you penetrate her. :)
Here is an example of my length routine.
[I’ve been focusing on length as well, but girth will still come along with it :) ] !make sure you’re warming up first, just a warm cloth around your member for say 5 minutes prior to workout can make a HUGE difference!! I like to start with stretches first, you don’t HAVE to do them first, but I find stretching before hand gives my unit a nice good hang to start my jelq from. You say you’re doing roughly 400 jelqs per session? Do some stretching before hand, try wet jelqing from a flaccid state, and get into a good low blood level erection, slow firm strokes are key, you should be feeling some pressure in the glands, don’t grip to hard though (ouch!) Before you let go with one hand, begin your stroke with your other trying to keep the blood moving up the shaft into the glands. If you notice you’re getting to hard, pause for minute and resume.
About halfway through the routine throw in some helicopters and some more stretching, (I personally hold for 10 seconds, but 30 should be fine) finish your jelqs and end with another warm cloth wrap. You should immediately notice you have a better flaccid hang, and within the first few weeks should notice improvement. The first half inch is usually the fastest and easiest to gain, it took me nearly a year to gain a whole inch to my length, but everyone is different. Just make sure you’re member can handle what you are throwing at it, you don’t want to overwork yourself, that can take time out of your PE’ing and is just a pain in the ass. I’ve been roughly off and on for 2 years trying to perfect a routine for myself, if you started in October and gradually worked your way up, I think your routine should be fine. I would say keep going with the routine, making a few minor tweaks here and there, and see where it gets you after say 4-6 weeks, if you notice an overall better hang, keep going with it. Browse around the forum for some more advanced stretches, but I suggest you ONLY try them once you’re confident in your PE ability.
Anyway
Remember to know your limit, play within it, and happy PE’ing brother!
Hope that could be of some help.
EDIT: I always forget something lol. Also, I like to do kegels, you can find info on them around the forums, they help with EQ and increased blood flow to your unit, as well as help you to shoot farther! Always a bonus ;)