An apprenticeship within the American Hockey League is a near-must for prime NHL goalie prospects.One week after 5 prospects from Japanese Convention groups’ AHL associates, we head to the Western Convention: Kaapo Kahkonen, Iowa (Minnesota Wild)A season after pairing with Andrew Hammond in Iowa, the 23-year-old has turn into the veteran within the Iowa goaltending image with rookie Mat Robson.Kahkonen (6-foot-2, 214 kilos) is 6-2-Zero with a 2.48 goals-against common and .909 save s...