Hey there sweetie. I'm so sorry I didn't get back to you sooner. We have friends in town and we brought a new kitten home:Love::Love::Love:.
For my thumb.... If I am using a stamp that I can add a little bit onto with out it looking to funky; I stamp very close to the side wall on one side, which leaves a gap on the other side. Then I paint a line of polish onto a side of the plate that will match my up to the stamp already on my thumb the best. And I then try to position in perfectly in the gap. Honestly it does not always work out but sometimes it does.
What I mostly try to do though is simply stamp my thumb dead center. That way there is a little 2 mm gap on either side and it really is not that noticeable but obviously it does depend on the size of the nail bed.
There is a great video on you tube by BeautyByMoi on this.
For flips sake Michelle, I thought I had a new stalker :lol: ... I accepted you and I've been wracking my brains wondering who you were since ha ha ha... lovely to put a face to the name... thanks a mill for the add