#876 結他維修隨筆：【 加裝 Ghost piezo 同 preamp 】
幫一支原本有十種音色嘅結他加裝 Ghost piezo 同 preamp，多埋自然 acoustic 音色。A Ghost piezo and preamp add natural acoustic tone to a guitar that already had 10 sounds.
#871 結他維修隨筆：【 複雜線路焊接嘅測試小秘技 】
複雜線路焊接途中不停測試嘅小秘技。A neat little trick for testing tricky wiring on the fly.