Well needs must and using your mini vice was a good idea. However, flattening thick parts, corners and cross seams still need a little extra help and the little gadgets I mentioned will help you no end, and non of them will break the budget. I particularly liked the Australian Pfaff demonstration, Margaret shows exactly how to use this gadget, and makes it look so easy and of course there was also a bonus, shortening a pair of jeans whilst not making it look as if they had been shortened.
Keep on sewing you are doing so well, and of course enjoy your lovely new machine. By the way after sewing through all the layers on the wallet, don't forget to change your needle, your machine will thank you for that.