WHY delay in solving the Lowu border problem? In his letter (''Lowu sometimes congested, never dangerous'' - South China Morning Post, August 7), Ambrose S. K. Lee, for the Director of Immigration, admits that ''only up to 73 per cent of counters are manned during peak hours''. This is deplorable. They will have additional counters when the Stage III Extension Project is completed in 1995. ''In this connection,'' says Mr Lee, ''we shall ask to be provided with additional resources.'' Why not ask for additional manpower now to utilise fully the existing facilities? If their lack of urgency is because they believe the situation is ''not chaotic, and never dangerous'', as Mr Lee says, then I invite Mr Lee and the Director of Immigration to accompany me across the border on the next public holiday. Let them stand on the ''sardine-bridge'' with their small children and their frail grandparents. Let them light up their smokes and push their trolleys, and when the barricade is released let them charge up the stairs and escalators like everyone else. Let them experience the peak-hour crush, and then tell me it's never dangerous. Alternatively, they could review the video footage taken by their personnel on June 25 when I and many others around me feared for our safety. Call it what you like, Mr Lee, but for heaven's sake do something now. Don't wait until 1995. BRIAN JONES Kowloon