What do you mean by "Those cabinets are notoriously not air tight so you'll need to either seal them somehow (maybe silicone the joints)".
And This is what's coming in plus I have 2 pc fans
My stealth grow box is now set up trying to figure out the best placement for 2 pc fans and best placement venting as well as installing an 4in intake fan with carbon filter.
Any good advice is the best advice.