I can personally vouch what Geoff says , my Father-in-Law had a BMB , and it was my TASK to plough his land with it , there were times when I would rather have been armed with a spade , they are very difficult to handle , unbalanced , and as Geoff says , almost impossible to keep in a straight line.
The plough itself on a Trusty is in a class of its own , but remember most trustys lack reverse.
Others to consider are a Clifford , which has a multi adjustable plough very similar to the Trusty.The Howard 700 is a very underated machine ploughing wise , reverse gear , and a seperate difflock……..food for thought perhaps.
Andy