First of all, congrats on your newbie gains!
If you are still gaining on the newbie routine, there is no reason to stop. It is an easy routine without much commitment in the way of time, and about the safest thing you can do, to boot. Go until it stops.
If your growth has slowed or stalled, you can consider increasing the duration and intensity of the routine, adding additional manual exercises, or adding equipment-based exercises. If you have been going for 4 months, give yourself a week off before starting a new routine. Start again with the old one and then slowly integrate the changes. Stick with your new routine for 4-6 weeks to see if it can start new growth.
My suggestion for modifying the newbie routine with manual exercises:
1) Add 5 minutes of JAIs to the stretching set.
2) Add 10 minutes of fulcrum stretches (A and V) following the jelqing set. This will increase the intensity of the stretch via the fulcrum mechanics and also place more emphasis on the tunica. I suggest doing this following the jelq set because I believe too much stretching can put someone into auto-pilot at which point you are just going through the motions. When I break it up, I find it is easier to stay focused on technique and purpose. I also think that the jelqing motion down the length of the penis works to break down the longitudinal layer of the tunica and allows the following stretch to more effectively encourage length growth.
3) Follow the fulcrum stretches with half as many jelqs as in the first set. If it was 300, do 150 this time.
4) Fowfer - all the time. After you finish your routine, stretch it up your crack and sit on it. You get a decent stretch during a fowfer with some effort, but most importantly you are not allowing it to turtle. Your physiology will dictate how long you can sit on it before you need a break, but don’t let it get dark or cold. Pull it out during your break and shake it or jelq it a few times. Let the circulation restore for at least half as long as you had it tucked, then sit on it again. If you don’t sit all day like I do, I strongly suggest building or buying an ADS. Try to spend most of your day at low tension stretch and be the Girtha - “never let it turtle”.
5) In addition to the above modifications, consider doing this routine in the morning and then doing an abbreviated version in the evening (or visa versa). Same warmup, but cut everything else in half. When you go to sleep, bed fowfer.
6) I skip the warm wrap following the workout. I believe that it is counter productive to plastic deformation. In fact, I think that applying a cold compress during low tension stretch following the routine may be more effective, but I have not tried it (because a cold compress on or near my nuts doesn’t sound like fun and fowfers are too easy). ;-) That said, do not skip the initial warmup or you risk an injury.
This is just my suggestion. Any thoughts?