lol
okay like key things
1) brick bounds requirements are exactly the same. a 1x1f stud is 1x1x0.4 blender units by default.
2) the part where you name meshes col or bounds or whatever is just naming the mesh using outliner or the properties panel.
3) to prevent bugs make sure bounds encompasses the cols. note that you dont have to make cols fit brick grid/scale like bounds does.
4) when exporting obj, just check off the same stuff where applicable and make sure "forward" is the actual forward of the model. by default its Z so if you dont change it you'll likely have a brick rotated to face up or sideways. just use the dropdown menu in the save settings to set the right axis