Very easy...I purchased the stove already converted 2 years ago.

There is a large outdoor show here every year and one of the vendors sells these stoves for $60.00 which I thought was a very good price. I had talked to the vendor for quite some time and he told me that the stoves take about an hour or so for him to put together (excluding the purge time and paint drying time.) He also makes a couple of different models and also had a couple of larger drum stoves that I was interested in. At last year's show, I looked for his booth and could not find it so I am hoping to see him at this years show in March as I wouldn't mind getting a larger stove.