i have to say that the title of this made me chuckle.
there is nothing wrong with your brothers suggestion, many a good conversion has been done by this method.
but bear this in mind if he decides to make use of the legs to add even more:
for judging whether a model can be seen to be shot at, it is whether the opponent can see the model's torso, and as such, if a model consists of just the chopped off legs (i.e. to make more your brother decided to make it look like the Orks were diving back), technically you wouldn't be able to see those models |