Okay, say you want to make a huge sculpture out of wood, dirt, and stone. You're gonna want your immediate inventory to have stone, dirt, and wood, along with torches, an axe, shovel, pickaxe, and maybe a sword if creepers are trying to ruin your beautiful sculpture. But this is a HUGE sculpture, and you want at least 5 stacks of each material, and you don't want to keep opening your inventory to move the blocks.
THEN THIS MOD (request) IS GREAT FOR YOU!
If you have 64 dirt in you available 9 spaces and 64 dirt in you inventory, then every time you place a dirt block, it refills, so once you place 64 dirt, it starts to take away from the 64 in your immediate inventory. Get it?
This will make building a lot easier. Thanks!
Also, have a transmitter item that you put in a chest, and a receiver item that you put in your inventory that allows you to use the blocks from the chest. (Thanks to adib for the idea)