Just a small update. I've continued as previously posted, adding turkey as a regular food for its arginine content, and trying (but sometimes failing) to keep my dietary fat low.
Viagra + Arginine + Citruline (VAC)
The bigger news is that I've used Arginine and Citruline many times now, as was recommended here, and I'm convinced it works very well. Initially I was skeptical that it would do anything at all, but the first time I used it was before a workout as directed on the package, and my muscles seemed to get as pumped as when I was in my early 20s. (I'm middle-aged now.) It's a bit of a bummer because it shows me another way that I've aged, which I hadn't noticed until now. But I guess I should have known since erections and muscle pumps are both functions of the circulatory system/blood vessel dilation/nitrous oxide.
I've also noticed that it takes effect very quickly, within about 15 minutes on a 12-hour empty stomach. This was also a surprise as I initially thought it might take days to build up adequate levels. But in hindsight it makes sense that it works quickly. Arginine and Citruline do not need to travel far, but need simply to be absorbed from the gut to the bloodstream where they're directly taken up by the endothelial cells there, which use them. So it's a short journey which results in a fast acting supplement.
For days that I punt twice, initially I experimented with using Viagra for the first punt, and then using AC (arginine + citruline) before the second punt. But I've since realized that taking them together produces the strongest effect: On a 12-hours empty stomach, a 1/4 tab of Viagra with a half dose of Arginine and Citruline (1.5 grams each) makes my face and body noticeably flushed within just 20 minutes. This is the sign that I know it's taken effect. And when the punt starts, I have maximally hard erections that come on quickly and linger even after cumming, with me having to push my still erect cock back into my briefs. It does go away after I hit the street and have been walking a few minutes. The reason for the strong combined effect, as mentioned by others in this thread, is that these components work synergistically. So their combined effect is not additive but multiplied.
If I punt again in a day some hours later, I can use then second half of the AC dose as a booster. For those interested, a good starting trial might be a half dosage of each component of VAC (Viagra+Arginine+Citruline) a half hour before hand on a very empty stomach (12 hours).
For convenience I pre-measure the two dry powders and add to a small empty plastic health drink shot bottle which I carry with me. I'm on foot and using the underground for most my punts, so I need everything to be light and portable. About a half hour before the punt I add about 40-50ml of water, shake vigorously to dissolve, and then drink on an empty stomach. One note is that the arginine has a bitter, nasty flavour. Initially I was worried that it was contaminated, but it seems to be the natural flavour of pure arginine. I've also thought about carrying the powders in a bag or sugar packet type thing, and then dissolving in a store-bought drink.
As for the Viagra, I will bite off 1/4-1/3 tab and chew, swallow, and wash down with some water. I typically do all this on the underground as I head towards my destination. I got tired of fumbling through my bag and then digging around separate plastic bag to get the pills, so lately I've been keeping them in a mint box for convenience. Does anyone have any other ideas how to conveniently carry pills for popping in public?
Cost per Dosage
Viagra Connect costs £4.37/50 mg tablet. I use about 1/4-1/3 of a tablet which comes out to £1.1 to £1.5 per dosage.
Aginine+Citruline costs £6-10 for 100 grams of each (around £15 total for both). If I use just a half dose of each (1.5 grams), the cost is about 25p per dosage.