Chainsaw Repair

Art Martin had one style which was 1/2" chisel with two cutters one behind the other with no space both lefts.Then one space and two rights etc .The comment I heard about full house is it really throws the chips but takes a tremendous  amount of power to use it according to Rotax Robert who for some reason is missing in action .I have no idea what happened to him .We corresponded via E-mail for a few years then he disappeared .