I've known a lot of people who have had trouble with their DL-4's crapping out...weather it be the cruddy switches screwing up or the expensive power pack going out
A friend of mine recently started modding them...
He fitted mine with better switches,
blue and pink LED's
BUT, he also does the tone/volume mod like keeley does
as well as powder coat jobs on them
$45-Powder coating (unscratchable)
$20 for any color LEDs
$35 for better switches
$25 volume Mod
Here's some pictures of the powder coatings, new LED's as well as the new switches
http://i19.photobucket.com/albums/b1...k/IMG_1660.jpg
http://i19.photobucket.com/albums/b1...k/IMG_1658.jpg
http://i19.photobucket.com/albums/b1...k/IMG_1662.jpg
http://i19.photobucket.com/albums/b1...k/IMG_1664.jpg
http://img.photobucket.com/albums/v2...w/IMG_0006.jpg
He's based out of Fort Worth TX...and I'm not sure how he handles out of state shipping, but if anyone in area needs their DL-4 modded or repaired...let me know and I'll get you in contact with him...
as for the crappy power packs...i've ditched mine for a godlyke adapter...you can find them on ebay for around $3....there may be a small bit of volume difference, but i have barely noticed it...