I've got a WRT610Nv2, with 32k NVRAM. currenly running Toastman 7481. My problem is that I'm bumping right up against the 32k NVRAM limit. I know I can do the upgrade procedure to make it an E3000, but in looking through the NVRAM settings, I think I see some opportunities to clean up some wasted space.
In particular, there seem to be three sets of wireless radio settings, beginning with wl_, wl0_, and wl1_. My hunch is that the wl_ settings are used on boxes with a single radio, whereas wl0_ and wl1_ are used on dual-radio models like the WRT610n. Assuming that's correct, would there be an opportunity to save space by having the firmware not use write these wl_ settings to NVRAM on dual-radio routers? I tried manually deleting some of them, and saw no ill effects, but they would just reappear when I made other changes in the GUI.
I don't know if this is doable, but it seemed worth asking — I'd rather not have to go through the hassle of the E3000 upgrade if I don't have to.