Hello,
Thank you for your question. As for graphics, you might notice I used not mine assets. It is better to ask a creator of this mod https://mods.factorio.com/mod/Bio_Industries because the assets in my mod are basically taken from there. That beautiful person allowed me to use their assets a while ago, so it's better also to ask them in person from your side. From code perspective I'm completely okay with your intentions please feel free to copy and modify it :)
Also, could I ask which changes did you make? Probably they could become settings so anybody could fine-tune it for their likings?
Thanks,
Engineer