Hollowing a cello back by hand is something many makers bulk at - and resort to power carvers,
If you want a surefire way to get 'in synch' with the working ways of the 16th or 17th century -
then 'hard phyical work' is a pretty good starter !
This is only a normal sized gouge - but with a massive turning handle attached. It is in fact a age old
Robert Sorby gouge bought for £6 in a used tool shop !