We houseruled that medkits can't work by themselves. Its just silly. How are they going to apply bandages, see the patient, put on electrodes, start an IV? We also ruled that they don't run at Rating X2 by themselves. Otherwise, whats the point in the first aid skill at less than 6. We just rule that you roll Log + First Aid + Medkit Rating. No wireless bonus. We decided it works like an AED. You hook up the patient, put in the IV, all while it is talking to you. We figure the bigger ones (4-6) have a some kind of endoscopy connections that you would hook up, kind of the size of a vaccum cleaner hose. it removes bullets, angry gall bladders, seals up leaks in internal organs, etc. Our picture of the size is more like baseball players gear bag, hockey bag, something like that.