Reason I thought it up was that IIRC any given item can be used in a crafting recipe. Water Purifier + (say) 25 Copper Wire + 8 Chunk of Metal, 16 Soldering/8 IT = XB Water Purifier?
I’d guess that implementing it would be working out the proportion of components needed for various capacities, then it would be probably just copy/paste & scale checks. Making one “Battery Bracket” mod would be easier on the crafting menu but would require expanding the Firearm-mod coding, and that seems like significantly more work.