I was looking at the following site, which shows a fellow's wood-canvas building process, and noticed that he uses what he calls the upside-down method of stretching and tacking canvas.
www.mcglynncanoecompany.com

I have no experience in building or restoring canvas canoes, but all I recall seeing here is the canoe being dropped into an envelope of canvas and even weighted down inside.
What might be the pluses and minuses of this upside-down method?

Process | McGlynn Canoe Company
What are all the steps to build a cedar canvas canoe?

I have no experience in building or restoring canvas canoes, but all I recall seeing here is the canoe being dropped into an envelope of canvas and even weighted down inside.
What might be the pluses and minuses of this upside-down method?