No drastic mistakes, just some queries as to the unit allocations at various times for some aircraft (and until I start re-checking everything, I couldn't tell you which ones!).
The only other slight mistake was one aircraft which is listed as having 300 series engines when it had 200 series, or vice versa.
I'll go through everything again before the next book is completed so that everything's 100 percent correct next time (unless we introduce some completely new mistakes - which is what usually happens with most books of this nature!).