I went and looked at a dsr 920 that a older guy had. He had it in its hayday. I don't think the battery has ever been changed by I think it has only recently been out a service. I cut it on to check it out, but I don't know a whole lot to look for to see if its ok to get. I did notice it did not have a tile for w5 or x4 but it did have a few I reconized such as g0 and g1. Would I be able to use this without losing these tiles? Is it even worth getting being I already have a 410?