yes, many thanks. 0.05 inch through hole look good. if one row, it can contact plate through hole with some bend force. swdio, swclk, gnd, vcc, nrst is 5 pins. the new swo not tried before, is one more pin. Document says spy on the mcu but need graphic programming on the debug pc to extract useful data. may not be too useful as now. for luxery, uart tx, rx will be 8.