I tried the poncho I made on Smem.
Its soooooo wrong!
Fair enough, on the arm holes I was winging it so I'm not surprised that's not right.
But the shape isn't right either. Its too wide for the length. I'll have to rip it back and start again from the hood down. This time I think I may increase every third or fourth row instead of every second row to make it longer.
And I may get out the measuring tape and do some maths to figure out where to put the arm holes.
Wish me luck!