Hi Elaine - glad to see you're still doing the TP52s!
Metal - for me the nuts and bolts shot is bang on. Good low key composition (always going to be slightly easier to light with shiny stuff!)
Captive - the hands are great. Really gritty presentation (could perhaps lift shadows a touch and increase contrast/clarity if you're using LR or PS?) but composition is spot on for me.
Miniature works but I don't think it's quite up to the quality of the other two. Lighting feels a touch flat, although realise you were probably focusing (boom boom) on getting the writing "edge lit". There's a brilliant book called "Light Science and Magic" that explains how to light almost exactly this type scene and it's a cracking read.
Happy is smart and on theme. Lighting will have been what it was, given it was natural daylight. It would be great to get a bit more light onto the undersides of the branches and bird necks, but you might have to resort to a bit of PP (shadow lift) to get that.
Great start to the 52 and looking forward to more...