It would be extremely helpful to people with little experience with JSON to have examples of the formatting of each of the input types supported by custom machine recipes in the wiki. While the guide does explain that the inputs are handled the same way as the input section of shapeless recipes, the shapeless recipe examples are not directly applicable to how the machine recipes are formulated.
An extra few lines demonstrating each machine input type would be helpful for inexperienced users to get a grasp on the unique JSON layout required.
eg:
"recipeType": "extractor", "outputs": [ { "item": "ic2:itemmisc", "meta": 3, "amount": 2 } ], "input": { "inputType": "item", "item": "minecraft:gravel", "meta": 0, "amount": 1 }

Machine Recipes
This category assumes you read the Crafting recipes at least a bit.

You did not do that else you would have noticed that it provides for each input type an example + a description (below the examples) of what parameters are needed etc.

And yet the fact remains I had 5 other people look over it and none of them spotted the issue either. The documentation is just confusing. The layout is poor and code examples, as I said, are not DIRECTLY applicable to machine recipes. It would not take much to clean the page up with some formatting and a few more examples to make it much more pleasant to use.
I could understand if it was just me having an issue, but when 5 other people, 3 of whom are very experienced, can look over the wiki and not discover the issue at first glance then the issue is not with the user but the documentation.
I appreciate greatly the time and effort you put in to providing the mod to the community at large, and I only provide this suggestion in order to better future users experiences.