Thank you for your post.
You are able to create waffle pod slabs with PlusSpec. The link below is to a tutorial video which explains how to do this.https://www.youtube.com/watch?v=KM4rPsfyCio&index=4&t=26s&list=PL_je7dD7rzFvJ4fJf7ZUKXdNarAWzNrOu
If you're ever not sure how to do something in PlusSpec there's an orange icon at the top right of the tool dialogs which link to a video tutorial playlist specific to that tool.
Would you be able to please let me know if this works for you?