I have built a stud frame for a built in corner wardrobe floor to ceiling. This is for 2 spacepro sliding doors I ordered from screwfix about 150cm wide. Rather than using a cheap end panel or mdf sheet, I built a stud wall with noggins for the wardrobe end as I wanted a proper plastered wall end which will look better painted and finished. Used 3x2 and 4x2 timbers. This is a L shaped 2 timber frame corner and overall seems strong and sturdy but when I apply some force to it...there is slight movement by 1 or 2 mm. Is this normal for stud walls or will it lead to problems like cracks in plaster? I assume there is always slight bit of flex unless you're building a wall out of solid brick