I wanted to pick everyone's brain really quick on a little problem I am having. I have a GK CX410 and it has casters installed. Well, whoever installed these casters put front ones back a little to far. This wouldn't be an issue but every time you put pressure on the front of the cab it wants to tip forward. This is problematic with me using a front heavy rack. It hasn't tipped over yet but there have been a couple close calls. Since then I have just been putting my rack back farther on it but not it looks like a balancing act lol. My question is this... If I wanted to reinstall these casters in a better spot, what would I use to fill the old holes made by the previous install. Wood putty, Silicon? I would prefer to not to just leave the holes. Any help would be awesome!