YES THER ARE SO MANY FACTORS...MY 1ST TIME WITH ALOTA REASERCH TOOK ME OVER TWO MONTHS FROM MAIL TIL TRAILS..U LAERN FASTER BUT ALWAYS BE STERILE N SCIENTIFIC BOUT IT IT HAS TO B PRECISE.OR U'LL WAIT FOREVA..DO UR STUDYING N LOOK AT MANY PAGES...NOT ONE SITE...REASERCH..