This is the link
Essentially, I'm teaching Advanced Fifth Edition to players (basically an upgrade to DnD) and I've had very good results with it.
I was doing character generation last night and it seemed to be working with a player for whom 5e and A5e rules explanations have previously been Charlie Brown's teacher.
The Dutch Door bit is there is a frame at the top of each sheet but the horizontal sections work separately but with a shared purpose.