I assume you are talking about milo guards. Milo can be cut without them, but you save many more heads with them on. We have cut milo with both a rigid head and a flex head and we used them on both headers. These were Deere headers.
I have a set of Britton milo guards I would sell for cheap there are enough for a 30' header they are located close to Great Bend Kansas. I don't need them anymore because I used to have 2 machines and now I only have one. I also have two wide wire concaves for sale which have low acres on them if anyone is interested. Call me at 701-368-1204
We have used HoneyBees with and without sorghum fingers and we don't put them on now as in most crops the front works better without them especially in leaning crops. In very light crops you can drop the occasional head