Sorry I live in the Portland area so not close enough for in person help but do you have the Manual for your Mark 5? Also the book Power Tool Woodworking for Everyone is a great resource for using the different functions of the Shopsmith Tool. The Self Study Course has sections on Lathe Turning in Lessons 9 & 10. These can get you started until you find someone close.
Mark V 520 S/N 09-11-01 completely upgraded to Mark 7, with all SPT's & more.
Model 10ER S/N R64000 first one I restored on bench w/ Shopsmith metal ends & retractable casters. Has Speed Changer, Model 4E Jointer, Jig Saw with lamp, a complete set of original accessories & much more.
Model 10E S/N 1077 oldest one I have restored. On bench w/ Shopsmith metal ends & retractable casters.