I pl glued ply to the stud and 1/4 " strips + used longer self drilling screws any were I needed them . I used a lot of stay put spray glue ( like 3m 77 ) on all of my paneling when I added to it ( I used solid oak wainscoting 1/4" x 32" h front to back but not behind any wall cabinets ) spray glued on to the 1/4 " ply )
using the sheets of 1/4 " ply on the walls just made it easier to add any thing to the sides with out making the inside size any smaller . some spots I just used long 3 / 16 rivets in to the 1 / 4 " ply to hold things . to this day I have not had any problems . maybe because I spray foamed the complete inside shell for insulation , added support . on all my upper cabinets there is a pantry or a floor to ceiling panel that is screwed to the upper cabinets for added support . I did this in the design of the cabinets , with all my sliding pocket doors . I tried very hard as to not use up any extra space for inside walls ( all dividing walls are 3/4: ply with veiner glued to each side or 3/4 " foam board with 1/8 " ven. panels glued to them .