Pruning Aubergines

I'm interested in the benefits of pruning the plants and/or hand pollinating.

My yields are very good and i pick enough from 4 plants (av. 12+ per plant so far) to use fresh with plenty left to freeze for winter but i'm curious as to whether it's worth the (small) effort to prune so as to increase yields. I may be able to reduce the numbers of plants i grow. Space is always as issue.

Anyone follow this practice? Any recommendations?