French cleats 101 advice please

[John Hoskison]

Hi all I am kind of new to the forum. Though I have been a kreg owner for more years than I can recall. As a CSS  (Complete Set Syndrome) sufferer I have obvious;ly got one of everything kreg make ( in my price bracket). LOL.  after years of waiting I am now retiring and finally getting my own workshop (YAY). I am cladding the workshop in hardwood ply 0.5 inch and looking at using French cleats for the storage system as ever these days there is simply to many posts nd YouTube on the subject yet they all seem recalcitrant to share simple details such a dimensions I am going to use 3/4 ply for the cleats I just wondered if any of you guys could suggest the width of the cleats I need to cut and the optimum spacing between them. Any shared experience welcome. Eg. Close together or further part and use spacer blocks and what distance to set them apart.. i have a 22’ x 8’ wall  set aside for storage. Any advice welcome. 

thanks in advance 

Unklejon