Take a peak at my template

[Lenny]

Before I cut my ply will this work I am nervouse about the sides, gap???

[dcobbett]

Looks good to me. I only can hope mine fit that well; couldn't really see all of it 'cause I was working from the outside.

[Lenny]

Thanks bud, I get a little freaky when doing something like this god knows why I don't think twice about cutting up a 30k kitchen to add receptacles

[71kidcasper]

I think you did an excellent job. The spaces you have all the way around will fill up nicely with epoxy and cabosil mixture.