Without him here, it is impossible to know how fast he will play it, approximately.
Watch me closely - only one can spoil it.
If you don't have it in your part, leave it out, because there is enough missing already.
It's so legato it's difficult to splice. Sibelius was famous for that.
Suddenly I was in the right tempo - but it wasn't.
I always feel I do it too slow, but then others do it faster.