Learnt a few hard lessons today, don’t use the clip and wedge system especially the clips that are acting as the spacer (2mm or 3mm) on ceramic tiles ( the ones I was doing were 900x400x15mm) as chipped quite a few of them depegging. Ceramics are too soft so found if I use the thin Rubi quick system they don’t touch the edges of tiles so don’t chip when depegging. A few bob and time to fix!! Even when using the clips and wedges on porcelain I would suggest using clips thinner than the thickness of joint you intend using and using spacers instead! Me I think I’ll stick to the Rubi quick system!