[cypher]

That is good progress
I don't have any experience with robos but a couple of my female Chineseys used to love using my arm as an escape route out of the plastic box so you may be right to be concerned, you could set up a playpen or something to contain him if he does escape that's large enough for you to sit in with the box then if he did get out he'd still be safe. That's what I did with mine although they tended to mostly run up my arm & sit on my shoulder rather than try to escape!
It would be nice if you did have a set up that allowed you the confidence to put your hand in as I still don't think the brush is going to help at all.