Removing grill, accessing xover on Snell Type A?

The woofers in my Snell Type As are out being re-foamed and I'd like to take the opportunity to put better caps in the crossovers if needed and to check the solder joints on the drivers (the woofer connections were barely held on).

Can someone tell me how to remove the grill assembly on the Type A? I could probably screw around and figure it out but I might leave some gouges :-)

Also, how do you access the main crossover? It appears that there's a bottom plate that has four screws going through it, but I can't tell if they are holding the plate onto something or if they're holding something inside onto the plate - I'd hate to take them out and have the midrange assembly fall out :-)

Thanks,
Vernon