Once burned, twice careful seems to be the motto of Manchester residents as they embark on a revision of the Manchester Sub-Area plan (Manchester Community Plan). County officials launched the process Tuesday at an evening meeting where, one after another, residents expressed frustration over how the 2002 plan was put into action (or, as they said, not). Many noted concerns with regards to building height in the downtown area. Concern over rapid development and traffic problems topped the list of issues that would be given close scrutiny as the plan is revised. The county and residents who volunteer to be involved in development of the plan are on a tight time line. They need to submit a draft to the county’s Planning Commission by September.