Peavey Firebass Chassis Removal

[mrdreadful]

Righto, I need to clean the pots in my Firebass head as they're pretty damn noisy. Problem is I can't seem to get the chassis out. I've removed all the screws (four front, four back, two bottom) but the thing won't budge. Obviously I don't want to force it, as that'll never end well, so I was wondering if anyone has had similar issues getting at the Firebass chassis and had any tips.

[Ou7shined]

Sometimes the top (handle) screws on amps like this hold the chasis frame too.

[mrdreadful]

Sorted. Turned out to be the two frontmost handle bolts. Thanks.