First off, I'm really digging this chassis
One thing that I will mention though, is that you might want to consider having a cutout in your belly pan beneath the gearboxes. If you do this you can disconnect the gearbox and then slide it out the bottom. Last year in competition we had a problem with one of our gearboxes, and it was a nightmare to pull it out to perform the repairs that we needed to. It took way too long, and almost cost us a match. It shouldn't compromise the strength of the belly pan too much, and it could possibly be the difference between missing a match or not in competition.
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2015: Utah Regional - Quarter-Finalists (3374 & 4158)
2014: Utah Regional - Semi-Finalists (1619 & 399)
2013: Utah Regional - Quarter-Finalists (1332 & 3562)
2012: Utah Regional