It's time to fit the motor, and to do this I use a technique that worked well enough on the multi-rotors that I've designed and built in the past. We'll be using just two of the four bolt-holes on the motor because (a) it's sufficient and (b) it leaves two spare if you strip the threads on these two, which is easily done given the diminutive size of the bolts. Normally these are tiny, and another advantage of driving them through the forward spar is that at least they've got a longer shank (3 x 30mm seen here).
The drive-shaft protrudes on this poorly-designed motor so I'll be using a couple of washers to lift it clear of the spar.
