#1
question folks... how many rack spaces does a sliding shelf to hold stompboxes take up?
#2
It depends on the size you get. Typically 1-2 spaces though.
E-peen:
Rhodes Gemini
Fryette Ultra Lead
Peavey 6505
THD Flexi 50

Gibson R0 Prototype
EBMM JP13 Rosewood
Fender CS Mary Kaye

WTLT

(512) Audio Engineering - Custom Pedal Builds, Mods and Repairs
#3
Depends what you put on them. Mine were taking up two, but that was a cramped situation so now they take up three.

(Hint: always buy a rack bigger than you think you'll need to accommodate expansion)