5D Mk II as a Telecine for 8mm and Super 8 film

I've got a cousin who is about to asphyxiate over a thousand dollar quote to do a Rank Cintel transfer of some inherited 1950's and 1960's family movies.

He is back to aiming his DV camera at fllms projected on a bedsheet.

Just wondering if anyone has ever tried using a HDSLR in this process, and how the rolling shutter and camera settings might be setup to minimize flicker, considering the projector shutter, etc.

Any pointers on how to setup the camera, or if it is a waste of time to try?

BTW - I own an Elmo GS 1200, which I still consider to be the finest Super 8 projector ever made. Also an Elmo 8mm projector with continuously variable frame rate. Both were manufactured in the 1970s, and have been well stored. Wonder what shape the drive belts and other rubber parts might be in...