Hi all, I got me a SVT 410 HE, it comes with casters, but they are not installed in the sockets. How do you do that? It says that a MALLET may be required to ensure a good fit in the socket, but I don't know if I can bring myself to do that! Besides, does that entail taking the socket off, putting in the caster, and hammering away on the outside of the socket? any thoughts?