A MOVE to arm border patrol officers is likely to be modified after complaints from some men forced to carry revolvers during their 48-hour tours of duty. Chief Inspector Maurice Watterson said the changes would probably mean only a certain proportion of the officers remained armed. ''At present, we generally work in groups of four men. In future, one or two officers of the group will be armed instead of all. This will retain the personal protection some officers require,'' he said. The move to arm border patrol officers came after Sergeant Tai Choi was killed in a grenade explosion while trying to arrest an illegal immigrant near Ta Kwu Ling on May 16. The main responsibility of the 800-strong detachment is to curb the flood of illegal immigrants into Hongkong. Previously, the 800-strong detachment charged with catching illegal mainland immigrants were armed with truncheons during routine patrols. The main reason officers do not like to carrying guns is reported to be the discomfort they cause. ''Officers are on duty for 48 hours. They have to carry and look after it for 48 hours, including when they eat and sleep,'' Mr Watterson said. He said the policy would be reviewed next month based on feedback from all officers in the unit. ''We haven't received full feedback from personnel of the unit. So far, it is a mixed reaction.'' Yesterday, about 1,000 policemen led by Commissioner of Police Mr Li Kwan-ha paid their last respects to Sergeant Tai at Hunghom's Universal Funeral Parlour. They lined up in the rain to salute the cortege as it left the parlour. The pipes and drums of the police band also gave their last salute. Sergeant Tai, 43, died after being hit by shrapnel from a grenade. The illegal immigrant also died in the explosion. Also at the service were Deputy Commissioners Mr Eddie Hui Ki-on, Mr Keith Lomas and Mr John Thorpe; Regional Commander of North New Territories, Assistant Commissioner Mr Douglas Lau Yuk-kuen; and legislators Mr James To Kun-sun amd Mrs Miriam Lau Kin-yee. After the Buddhist ceremony, traffic police escorted the coffin to the Junk Bay Chinese Cemetery. Sergeant Tai is survived by his widow, a son and two daughters - one of whom is in the police force.