Change the Kawarimi procedure

Currently if i'm not mistaken, to activate Kawarimi you would need to execute the hand seals> touch an object of similar size after focusing chakra into your hands. If you wanted to Kawarimi with a tree log , you would need to literally have a spare tree log by any other means. So why not changed that to resemble cannon in a certain way; Why not be able to automatically switch with a log after executing the hand seals> and then focusing your chakra to the tree or object. Make it so that if you're in the range of a tree ( 2 tiles) all you need to do is do the process and your kawirimi will be legit and you can substitute with a tree log. Also if the character leaves the range of the tree ( 10 tiles? or less ) then the Kawarimi cancels out. It also last the usual amount of turns before the Kawarimi runs out ( 3 RP turns? ). This way it will make it the Kawarimi appear more flashy and who knows what will be the out come battles this way.