Low bodyfat is everything. Genetics play a major role. Nitric oxide expanders help too. Lots of arginine and pycnogenol etc etc. Things that increase rbc such as Eq. And the finisdhing touch... drink lots of water.
I'll give it a try once I'll drop more bf, but I wonder if I can find a synthelator thread with pics, or any kind of visual info on the product's results?