Hi all. Ok have put together our 2nd battery and tray install.

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Impressive set of directions here.
Thanks again.Glad it was useful. Install looks clean. The 31m is one awesome battery!
This is the method I chose because I did not want to modify the existing electrical system.Do you have any pics of the connections you used to lengthen the cables. I got my new 31M Diehard in the factory spot and it fit just fine except for the tie down. My cables reached without any problem. I want to extend the cables to install a Battery Brain and it's too tall to mount on top of the battery (hood won't close). The only place to put it really in on the front of the battery and I'm pretty sure I'm going to have to extend my cables. I'm open to any advice and yes I just committed a thread jack.
Yes, absolutely! I actually did not grind any of it, just cut with a saw and filed. Its got fiberglass and is surprisingly fragile. I would even recommend mask if grinding this stuff. We always try and use gloves for particles or chemicals; our skin acts like a sponge...Great write-up.
I noticed you have your gloves on in one of the pics.
I'll just note what CDan told me when I bought mine -- be careful when cutting, grinding, etc the battery tray, as it's made of some hi-tech sh*t (fiberglass or?) that will drive you nuts if you get it on your skin, in your eyes, etc. Be careful, take precautions, like the gloves, clean up afterwards.