Yeah, thanks for the comments ladies!!! :-)
I finished it now, and here is a link to some more pics. It is on Facebook BUT I made the album public so I hope it works :-)
I changed some ugly looking numbers (Emperor, Lovers, Chariot, Hermit and Moon were just terrible) and now I am very satisfied with the final result.
Today I made Courts and Aces as well. I'm over with it now and can start to use it (oh...?!). I will not go ahead with the minors as, like often with LS decks, the card meanings obviously came from Mother Ship Outer Space and I won't bother learning them.
ABOUT YOUR QUESTIONS:
The stickers I used are the ones you can see on the FB album cover: size A5 (ooops, that's European!) of golden stickers that are pre-cut. I know here people use them a lot to make their own wedding invitation cards for example. Sounds familiar? Ahaa, the official name is "border/corner peel off stickers" :-)
So yes, the cards get thicker but not that much, the whole deck still fit in the box though without the (not very useful) LWB.
I put the stickers in place carefully and maintained them for a few seconds which seems to be efficient, though I played with the cards after, they don't show damage.
I will not dare to shuffle like a mad woman though since I don't want to take any chance. Normal shuffling while keeping the pack quite loosely in my hands looks fine.
Now I hope the link works.
Please note that I am not bragging or looking for compliments (though they are always welcome :-P ). I just want to share this wonderful new experience :-) Like any handicraft project, it empties your head of all the negative sh**, it is liberating, empowering, FUN and the hours go by soooo fast (which is good when the kids are at their dad's).
Guess who must do their tax declaration now since they were too busy playing with scissors and stickers for the last two days...? I wonder how they would like it, in the tax office, if I put some golden borders on their boring form... ?! ;-)