The repair kits are serversided that's for sure. You shouldn't forget that it's a free to play game and the developers are earning money due to micro payments. And these repair kits are part of it. A no damage option might have an impact on their sales, therefore I'm considering your request but I won't give a garantuee.
//edit: No durability option, sorry.
[Edited by 0x90, 9/13/2013 5:03:47 AM]
Yeah, that was exactly what I was thinking when I made the request. Thank you for adding even more options to the trainer.