Manual Styretching is well worth making a significant part of your routine. This is particularly the case is stealth is an issue.
A good manual stretching session can be accomplished in 20 minutes and if you have mastered the technique, these sessions can be used as an alternative to hanging if you are not able to find the privacy on that day.
Manual stretching can attack the ligs or the tunica (with a fulcrum) … or both and the overhead is very low. No wrapping (except maybe a cotton towel), no lube, not equipment … just you and the subject of your efforts.
I have gained about an inch in BPEL in the past 6 months and I would say that Jelquing and manual stretching is about 50% of my overall hours. More impoprtantly, on those days when I cannot hang, I can always find space for a couple 20 minute sessions in the bathroom to get my stretching done. It is the only way that I have of maintaining the consistency that I fell is necessary for continued gains.
Starting (10 / 2011): 6.50 BPEL, 5.50 MEG
Current: 7.50 BPEL, 6.00 MEG
Goal: 8.50 BPEL 6.50 MEG