DBDRAGGUY 10+ year member
CarAudio.com Veteran
It looks good for your first efforts. Looks like you took the time to stage your cuts. I also think sanding the additional caulk off of the bonding surfaces is a good call. Not everyone is a master box builder(including myself) but you get better over time. I am building probably my 20th box now and still make mistakes. Access to the right tools makes a world of difference also. And for everyone that had something negative to say should post a pic of there version of the correct way to do it.