After looking on Ana's homepage for quite some time and dreaming about building my own furniture, I finally took the first step and ordered myself the small Kreg Jig. I am so happy with the outcome!
Living in Switzerland, I had to do some calculations as the wood available has different sizes and of course, I am used to centimeters... And math is not my strongest skill! But apart from some minor miscalculation with the back of the sofa, it all worked out - luckily I the slats were too long and not too short :-)
Thank you Ana for sharing your plans!