Hi, Wondering if there is any new info or analysis of this gauge available? Anybody find a copy of the 64 page manual and read through it? Anybody have this manual avail for copying or for sale. I bought a Performeter but I guess I need the book or the 1953_54 magazine article that reviews the product to understand and use it...Anybody find this and can let us know what magazine specifics are? Thanks for any additional sharing?