Our shop deals with fleet vehicles (high utilization). Our shop consists of two shifts, approximately 15 techs in all and all our techs use your Tracerline system for hard-to-find leaks. With road construction, some leaks are pinholes produced by rocks hitting condensors or factory weld problems at cooling fins or assembly problems (o-rings). I would recommend your Tracerline system for leak detection to any service center. Thanks for all your years of help from your products.”