I have to admit I'm still a bit worried about cutting into it. Especially as it's only new!
So I have decided that before cutting it, I'll try this first. I'm going to get a cooling rack or something like this:
Then I'll set the rack on my charcoal tray and put the charcoal on top of the rack. The ash will still build up in my original tray, but not as much and the air will still be able to get underneath the coals whether there is ash or not.
Has to be worth a go?
(I mean 1 rack, not the 3 tier thing lol)