hi
whats nerf hobby? sorry i m not native english speaker ;-)
To my point of view the HL Leopard do have one of the weekest Heng Long hulls, and i knew all the lidel thinks wich comes to the Hulls wenn thay becomes older. So I want to have somthing in side my Leopard what will save me for all the lidel damages.
Sure the most are not bateling and the most don t drive realy much so yes this enforcment is maybe not needed.
But if you made your tank haviere with alle metal tracks , roadweels, spezial sound , spezial electronick (you can put in alot in a leopard) you will easyly reach 7-9kg and that is a whight the HL hull is not made for, expezily if you want to drive like a real Leopard does.
cu christian