Hi Martin,

re:
> If I click to start the line and then type: 4 7/8" the line terminates somewhere near the Origin, in fact
> all lines show similar behaviour when using the 'space' character.

In that particular field it's also looking for x y values and it's deciding that 4 7/8" is a 2D point location with
x = 4
y = 7/8 inches = 22.225mm.

But I can probably tune that if you have the inches mark (") on just one piece then treat the whole thing it as one feet & inches value instead.

- Michael