The CEO of Interfor Corp. says profits from strong lumber markets mean the company is well-positioned to add to its stable of sawmills in Canada and the United States through acquisition.  Ian Fillinger says the Burnaby, B.C.-based company has a "lead-with-lumber" growth strategy but it will also consider buying mills that have attached businesses such as plywood, wood pellets or engineered wood products.  Interfor is reporting fourth-quarter net income of $149 million on sales of $662 million, up from a net loss of $41.7 million on sales of $457 ...