Would love to hear more step by steps for this. I have a start9. Is there any video tutorials on this that you have found? 

 No,but in community forum  search for switch from Bitcoin Core to Knots,after install Datum 
 

 It doesn’t seem that Knots is supported by Start9 yet, but soon 

 You can activate developer mode and switch from BTC core to knots,in actually version from start9 you cannot run simultaneously both 

 Pretty sure it’s on there from memory, try connecting to the community App Store instead of the official start9 supported one. I could be wrong 😑 

 Yes but you can only activating developer mode
 

 https://community.start9.com/t/installing-bitcoin-knots/1997 

 Thank you very much. Will take a read later 

 Yep! It is. Now when I see it, it says that it is already installed (that being bitcoin core). So how to switch between the two, and what does this do exactly for when one sends a btc transaction to a sparrow wallet using electrum server? 

 Yes,I think this is very important to use your node for mining and that is now possible with Datum  

 And don't forget, connection between #Datum and #Ocean are encrypted.