Thanks for the update, its great to see this tank is still going strong several years on. I am really considering a plywood tank myself, though I'm hoping to go 168x48x36t but will only have a 96" viewing pane, so that my fish will be able to swim past the window on the ocean.
I too have a Vlamigii and would be building this new tank for him and my other larger fish that are quickly outgrowing my 200 gallon cube, do you think a Vlamigii would benefit from a taller tank or really is it more the length, as I have considered going up to 40" tall as this will be mainly a fish only tank... with some sofities and LPS up on the higher reaches of the rocks.