Hello! I'm renovating a bedroom and the plan is to put huntonit proffsvägg on the walls and sloped ceiling. We've torn down the old tretex. Behind it is a plank wall. How large irregularities can the panels handle? It will be wallpapered later, so if the seams aren't perfect, it's not a big deal, I think. I'm also wondering how to deal with the sloped ceiling (which in this case will be a wall), should I bevel the short sides and fit them snugly, or should I install with an allowance for movement there too? I find the installation instructions currently available lacking. Any other tips and tricks from those who have used these panels are greatly appreciated 😊