A dispute between contractors was heard by the Poisne Judge at the Summary Court this morning, the claim arising out of the erection of the open-air cinematograph theatre at Kowloon last summer. Two contractors of Yaumati and Kowloon were suing two other contractors for $597.50 being the balance due under a contract. Defendants obtained the contract to build the 'Palisade' open-air theatre, and they sub-let the contract to his clients. They had done the work, but had not received full payment. The original contract price was $1,080, but that was later reduced to $920.67, because only two-inch concrete was put in, instead of three-inch. The contractor had been paid $995.17, which was made up of both cash and material.