http://www.youtube.com/watch?v=aEDBrT63khQ
iyoh.. u lazy bum.. lol just search on youtube. anyway this is quite a nice brainless guide to replacing the foot switches on the DL4
the cover comes of the chassis quite clean an simple. dont know much abt paint tutorials.. once again.. lol just youtube la! oh for your sparkle in the paint job.. just buy like art and craft glitter and like sprinkle it over before u apply the clear coat i guess? sounds like peas.. but try at ur own risk of course =p
theres ultra bright white led available, enough to blind eyesight on dark stage.Those can consider as well.
if still want more, also have tri colour blinking led as well. it will blink through sequence of colours when activated. only concern prolly the switching wiring need to be well isolated if not when its blinking, it will bleed into audio path.
anyway, imho, such decorative mod just do for fun and if having time. if not, its just taking attention from music crafting.
Gold? go for it man! i'd even go to the extent to say if ur gonna bling it.. GO ALL THE WAY. get purple LEDs... pimpin' yo!