Photos as promised
https://img2.brain3.photobox.com/54476757124ea23f75642fd409afdb489fcb6b6c02da64e0099c76ce099e2cc86b7c1034.jpg
22mm plastic overflow pipe. T connector
https://img2.brain3.photobox.com/54230950cdd15dadf8d71f0992ee5e8cea4d3c581b92ea073298fd4bb29ba3dd407f079d.jpg
CoCo and Yagi
https://img2.brain3.photobox.com/03832441bf32afa0b492cf79a6e2860d76bfb8b3bbe1084b36e4f9e2cceaee1a858378cf.jpg