If I recall correctly from Jim Snowdon's build, the errors in this kit were much more fundamental. These were the pre internet days when it was more difficult to check the accuracy of diagrams and the lack of a surviving prototype wouldn't have helped. Now of course it is very different and we have the 82045 as an amazing resource.
This is also, I suspect a hand drawn kit from a previous century when expectations were lower and it wasn't unknown for the draughtsman to take small liberties in order to stay within the confines of the available etch. As part of my ,82004 journey I discovered that the original Triang model was redrawn to fit an existing mechanism and is far from being dimensionally correct.
One day, three hours after I finally finish ,82004, Bachman will announce a RTR 3MT for around £500!