That's really helpful, thank you for the links. I'll have to make my way through your site, it looks like a good resource. I hope you keep posting tutorials.
I've looked at those and your list of tools so far. I do wish there was more information on the groups about good construction techniques and design in between all the images. I'm getting there but I'm sure there are many brilliant tips on small scale sewing somewhere just waiting for me to stumble upon them.
I've sent off for a couple of books by Erin Hentzel which someone said had good technique info so we'll see.
The construction techniques I'm using now are very similar to yours. I'm also a fan of understitching the sleeveless tops and have found it easier if I do the sleeves first (sewing each side up to the shoulder seam) for a bit more easy access and then the neck. I couldn't get all around the neck but just filled the gap with hand sewn back stitches of a comparable length.
The skirt on your tutorial is very full too and it reminded me that I forgot to give it a press and steam to reduce bulk before sewing it together.
As for the tools, we already share a lot. I got my extra fine long glass headed pins for sewing the dancewear but they've proved so good for the dolls too. As have the very small clips that I got for the masks in a mixed size pot. For thread snips I've become a convert to good quality (not necessarily that expensive though) curved nail scissors. Mine are Wilkinson Sword and were around £5, I think, if that. You can cut off loose threads very closely without the risk of catching the fabric and they seem to stay sharper so much longer than the thread snips - even my previous Kai ones. They're also not bad as a pusher/guide for the tiny clothes going under the presser foot as the points don't dig into the fabric.
I'm finding my new Duronic mini iron comes in handy too. It has a double ended sole plate (points both ends) which does seem to make it even more manoeuvrable than the previous one.
The only other thing I really wouldn't want to be without now is my tailor's board. I hardly used it for the first couple of years but between the masks and the doll's clothes it never gets put away these days.