That mesh won't last long, and make sure it's not galvanized!
Are you using the 2" bung that comes in many of our lids? I only use 2, 3/4" inlets. Reason for this is I know what certain lumps max out at temp wise in my drum.
5 inlets is way to much! Ive had problems with magnets personally. Not the best seal and don't hold as well over time.
This is just my opinion but I keep my intake equal to or just less than my exhaust. This prevents stale smoke and keeps my temps from jumping too much.
UDS (not so U) UDD, 22.5 OTS, Coming soon: mini UDS & double barreled RFS