[HELP] crafting custom tool questions

[Marco98]

I've done a mode where a tool, without crafting stations, can craft another tool...
I wonder if i can make a string that make the first item% get transfert on the new item% (example: shovel (60/100 current uses) make a supershovel (60/200 current uses when crafted);
hope if this is possible...
and another question is: can i make DST capable to find a tool in my handslot for crafting another item/tool/armor?

if you need my mod files feel free to ask