a couple of years ago, Sandra replied this to me:
"I can’t quickly find where Jane demonstrates putting lease sticks back into a threaded warp. However, if you raise shafts 1 & 3 and slip your first lease stick in and then raise shafts 2 & 4 and slip in your other lease stick, you will have returned the cross to your warp. Secure your lease sticks in your normal way and you will be able to make changes to your warp."
You could read the whole thread by typing in Lease into the search area. I can't recall off hand what the PW shafts are for the Bronson's lace so, it might not be 13/24 or if what I just said makes any sense or if it makes a difference.
Also, put in the lease sticks and secure them well, before your cut your warp. (oh boy did I forget to do that once)