Wow, I am really shocked. I cannot believe you do that routine. I would never be able to put myself through that kind of torture every single day. Given that you have only gained 0.25" in EL since September 2011, you must change your routine because it is obviously not working for you. 0.25" in EL in 10 months is absolutely not normal. You are wasting your time working your butt off, and have nothing to show for it.
First of all, your concerns about masturbation affecting length ... pure bullshit. Masturbation will affect your EQ, just like DLD said, making you appear to be smaller than you actually are. The only variable that you can always rely on, that indicates you are truly making progress, is your BPFSL. Poor erection, good erection, it doesn't matter - BPFSL can only shrink if you are slacking off, and not doing your routine correctly. The longer your BPFSL becomes, the more progress you are making, because BPFSL gains always lead to EL gains over time.
Your routine, in my opinion, is bat shit fucking insane. If you want to gain, you need to focus on one target tissue at a time, starting with the ligs. Manual exercises might not get you very far, if your collagenous tissues are very tough to begin with. They may require a lot more stress than your hands can provide, which would explain why you gained so little in a period of 10 months. You are obviously not deforming your collagenous tissues in a dedicated fashion; instead, you are trying to deform everything at once: skin, ligs, outer tunica, septum, etc. It is going to take you forever to do it that way, especially if you are a tough gainer.
If you are serious about making length gains, then you need to do it in a structured way. You should learn about penile anatomy, etc, in order to understand exactly how to proceed, and make the quickest gains possible. Based on my experience, pulling on my dick and wearing an
extender gave me a 1/2 inch gain in the first six months (easy newbie gains), and the last 5 months I didn't gain fuck all, so trust me, I feel your pain. Since then, I gained 2" in EL after I purchased a Bib Hanger. You should look into hanging. Work up to a couple of hours of hanging each morning, and go about your day. Manual stretching,
extenders,
Bathmate, etc, keep them in the closet - where they belong. It is less time consuming as well, compared to what you're doing, and definitely more effective ... without a doubt.
Good luck.