There have been a decent number of guys report length gains with just jelqs. Horse440s will get you mainly girth. It is possible one could see some very minimal length gains with only Horses, but they wouldn’t be substantial. I would personally work on length exclusively before I went for girth (that is, 86 the Horses for now). Also, if I were you, I wouldn’t completely eleminate stretching. First I would try doing more jelqs or doing the same number of jelqs I was currently doing with more blood in the penis before I cut out stretching completely and see if this improves your erection quality. If so, great. If not, perhaps decrease your amount of time spent stretching and supplement with jelqs until you find the perfect balance.
Edit: What is your current routine? There is also the possibility that you are overtraining. (Sorry I just threw this in here when in fact, I may should have mentioned it first but I just noticed your post count and join date.)