This is the reverse view. As can be seen, with the coachbolts recessed there is no gap between the 2 pieces of plywood.  

The bearings and shaft for the medium speed shaft are in place and the first part of the pressed steel bearing housings are in place for the low speed shaft.  

The reverse view of the powerhead showing the bearings and medium speed shaft.  

This is the completed powerhead assembly with all belts etc in place. Only when the machine was almost finished did my son and I work out that the two shafts needed swapping. Bugger!!!!!  

Again, a reverse view of the completed powerhead assembly.  

This is a view of the completed overarm assembly. The hinges may have to be replaced but I'll only know that for sure when we fire the beast up in anger.  

Now the spring adjustment hooks have been fitted into the powerhead.  

Fitting the powerhead into the base went smoothly enough. It was good to get a sense of the overall size and weight of the beast.  

Another view of the powerhead sitting inside the base.