This is the £20 'Bulgarian' Box for those of us with no woodworking skills, or are just too lazy.
The Dealer £300/£400 versions are just described as available for Trads.
On my +4 the box width is higher than the squabs so the width was not really an issue.
https://tm-img.com/images/2018/11/21/Armrest1.jpghttps://tm-img.com/images/2018/11/21/armrest2.jpghttps://tm-img.com/images/2018/11/21/armrest3.jpg
