I just got a Tanaka 5601[ a Redmax G5200 ]. Everywhere on the saw is written Zenoah Japan. The cylinder has Zenoah cast in it. Quad closed port. I want to port the cylinder and i would like some help. Should i open the jug and case like Husqvarna 346? Or keep it simple and just open the bottom side of the transfer, intake and exhaust . Is EHP posting here lately? Thanks.