I recently bought a portable hematocrit centrifuge to test my volume of percentage of my red blood cells. Iv been pre loading iron supplements for about a week and a half, ready to start a cycle of EPO. EPO raises red blood cells so high that you need to test your hematocrit at least once a week to make sure you don't go to a level where death can occur. To use a hematocrit centrifuge you first take a finger prick with a lancet and use a capillary tube to draw the blood up. It is then placed into the centrifuge and spun until you get a stable reading ( about 2 mins). My baseline reading is 42% as shown in one of the photos ( taking at night, wrong time of day). I will be starting on Monday doing 12000iu a week for the first two, three weeks depending on my levels then a maintenance does of 3000iu a week after that ( depending on the stuff being gtg). Signs of legit EPO will hit you like a steam train nearing the 2 week mark. I suppose a hematocrit centrifuge could also be used for testosterone as it also raises red blood cells.