I'd find out more about what Calculagraph is, and maybe make virtual version; obviously they are doing the job in CueandCushion, but something mechanical, made in 30's, just isn't platicial to log anymore...but the function and ease of training is very obviously.
I'd find out more about what Calculagraphs are, and maybe make a virtual version; obviously they are doing the job for CueandCushion, but something mechanical, made in the 30's, just isn't practical to source anymore...but the function and ease of training obviously appeal to CueandCushion.