Projections from Past Seasons

I’m working on a program to blend multiple projections together and I’d like to derive the individual system rates empirically rather than assuming equal weights or some similar approach. Does anyone know where to access previous years’ preseason projections for download? I’m just using Steamer and Depth Charts right now but plan on incorporating ZIPS and potentially non-FG hosted systems at a later date.

Anyone have a lead on where I’d find files (or maybe you have some previous years projections downloaded that you could send me?).

Hoping the program/code is something that could be shared here if people are interested

Not sure the answer to your question, but are you aware that Depth Charts already averages the Steamer and ZIPS rates? Not sure how it helps to blend it with the other two, since it is already a blend of those.