1. p. 24; Unit TDMMF5705A should read .......5707A
2. pp. 26, 28, 33: Unit TDMMF3207C, chapter 19.3 = Qns 263-281 should read 118-136
3. p. 33: Unit TDMMR5507A should read .......5507B, and consist of chapters 4, 8, 9 & 19.4.