Since i realy like the SA Big mining Drill i would suggest that, if its installed with the Standalone Big Mining Drill
mod (https://mods.factorio.com/mod/um-standalone-big-mining-drill?from=search), there is a option to move it further down the tech tree as an upgrade to the mining drill MK3 from Krastorio2 or the Big Mining From SE if Krastorio is not installed, also renaming it to Big Mining Mk2 would help to distinguish both. Currently Big mining drill dfrom SA is unlocked quite erly and invalidates all other drills upon unlocking
ty for considering
adrian
