Thimbles in spectra eyes

[Tom Roberts]

After several days of making a fool of myself attempting to follow Brion's nimble fingers on his video I think I've finally got the feel of the spectra eye splice.( double braid).
I need to make a bunch of eyesplices around solid thimbles.If I don't insert the thimble until the end it won't fit in, but if I put it in earlier it's hard to get the cover all the way round. Is there a magic moment to do it or any trick of the trade?
Thanks Tom