Box feedback

[Pro7]

Hey guys me and a couple buddies (luke7 included) are makin a box for Luke's 10's and this is our first box build. I was just looking for some a couple tips or tricks for improving the process, onto pics

This is where we ended at for the day

On this side we needed to use some extra glue as you can see since there was a slight gap in the middle of the board and we are gonna make sure to use enough silicone on the inside edge

I just threw the baffles on there to show what our plan is. You can see on the far right corner how there's a like 1/8" difference in height so how do you guys deal with stuff like that? I was thinking maybe so wood filler to flatten it out? That was the second time we tried making that panel, the first time was worse...

This is a better view of the would be gap

I am pretty pleased with how it has turned out so far for it being our first build but thank you guys ahead of time for any advice or constructive criticism