Wedge a big book up under your undercarriage as if you were sitting on it like a saddle. Push it hard up there and hard against a wall, making sure it's top is horizontal. Bare feet, flat on the floor. This is easier with an understanding assistant :) When you have the book all setup, mark a line on the wall at the top of the spine.. use this for further calcs to get a saddle height start point.
Wedge a big book up under your undercarriage as if you were sitting on it like a saddle. Push it hard up there and hard against a wall, making sure it's top is horizontal. Bare feet, flat on the floor. This is easier with an understanding assistant :) When you have the book all setup, mark a line on the wall at the top of the spine.. use this for further calcs to get a saddle height start point.