Nice cabinet! I like the contemporary look of it.

Just a word of caution.. make sure it's not totally sealed and air can still flow freely inside.. It looks like the doors aren't completely closed, so that's a good thing..

I had my collection in a tall cabinet and over time, the ponies started to stink, gotta love old plastic! hah.. Realized it was pretty air tight and there wasn't enough circulation. I eventually had to air them out and display them in an open shelf bookcase, which worked fine for me. The feline left them alone for the most part.

And keep the hair wet.  It MUST be wet and/or full of conditioner, otherwise it can burn and melt.   

Yes! Can't forget that.. I almost did..heh

I always used conditioner.

I'd always put it on the lowest possible setting on the flat iron, and I worked with fairly newer ones...and as Sugarberry mentioned, even the same model may vary...Obviously the newer ones will get hotter quicker. A few quick passes should do the trick. Just don't leave it on one spot of hair for too long. I never worried about numbers. 

Amazing work!!

I'd use a paperclip..insert it into the notch and turn it like you would the key.. 

Congratulations! 

These all sound like great ideas!