M1KPNAV w/ SP12F

I know the KP2 has a provision/cutout for the SP12F to be installed - obviously the KPNAV doesn't have this as part of it's mounting box. Does anyone know if there is space (depth is my main concern) to make the cutout and mount SP12F's behind the KPNAV? Has anyone done this?

Well, I'll be giving this a shot soon... I'll report back.

So, there is no practical way (space between KPNAV circuit board and the back of the KPNAV enclosure) to do it with the ELK-M1KPNAV parts alone. However, it can be done if you also add the ELK-M1BBKN. I did have to cut my own hole in the BBKN for the speaker. Here is a shot of that below, along with one of the KPNAV also installed: