Thanks for the feedback and the suggestions.

I didn't realize how thick the micro-files were until I did a couple of the grate slats. I don't mind it as big as it is for the center grates. They are larger grates and should probably have larger openings. But, I'll try the hacksaw idea for the side grates. I have a mini-hack saw as well as a jeweler's saw and the xacto saw blades. The Xactos weren't for me on this job. But the other two are worth a try. Thanks for the suggestion.

I think I can hide the error or minimize it with some screen material glued to the underside.

RE: tracks....the photos don't do them justice. They're actually a smoke color. The metallic nature comes through, but they are blackened. I bought them already blackened from RCCommand a year ago. According to the forum members that were tankers in the 1:1 scale, tanks' tracks were minimally painted if at all during the era of these tanks. So, some blackening is all I'm looking for. That said, I like the bluing idea. Where do you get it at? Would a Wal-Mart carry it?