Grid Elements per Row (Post Masonry Grid)

I desire the ability to set my Grid Elements per Row in Post Masonry Grid at 5 with Visual Composer. The only options available are 1, 2, 3, 4, and 6. Setting it to 5 is not an available option. If I set it to six, the elements appear too small. If I set it to 4, the elements appear too large. Setting it to 5 would be perfect.

I know this might involve some type of coding and realize that I may have to pay someone to do this for me, but I could probably manage if someone just point me in the right direction. I, also, realize that this might be a question for the developers of Visual Composer, but since it came with the theme, any direct support from them is not possible unless I spend another $34 to acquire a product license.

I appreciate the help and hope to find a solution. Thanks!