a newbie question, how can i tell if i have the double cut film holders? mine are lisco. also there is a little rust on the pegs at either side. i got 3 free with the camera.

Odds are you do have double film holders. Look for 2 handles on one end. Pull each out and you are pulling out a dark slide. 2 handles = 2 slots for film. The pegs you mentioned (2 of them, right?) are used to hold the dark slides in after the film is loaded.

Double cut film holders are roughly a 1/2 Inch thick and have two darkslides and are made of wood or plastic.

Single cut film holders are stamped sheet metal, are less than 1/4" thick and are usually found in European film sizes (9x12cm 12x13cm and occasionally 3 1/4 x 4 1/4)