Looking to build a zip line with 4% decline for the kids with: Class 2 50' CCA syp Class II telephone poles sunk 6.5ft. 3/8" cable 7x19 Galzanized cable for guy wire and zip line. 1st zip: 100ft Starting at 26ft on a 6' hill->Ending at 22ft 2nd zip: 120ft Starting at 22ft -> Ending at 17.2 on a 6'hill 3rd zip:100ft Starting at 17.2ft on a 6' hill -> Ending 19.2ft 4th zip:150ft Starting at 19.2 -> Ending 13.2ft 8ft. Ground anchors on Guy wire tension pull tested to 5000lbs. preferably at 45degrees to pole within 1 foot of zip line attachment location. I plan on buying a tension meter to check cable tension. A few questions: What should the Zip Line Tension be with 250lb person from center of zip line What should the guy wire tension be without 250lbs person on zip line? What should the guy wire tension be with 250lb person on zip line? Up to what angle am I ok installing the guy anchors to? 45 is recommended. but we may be short on space. Looking at the guy wires from a site plan view; What angles should I set the guy wires in relation to the zip lines? On the same plane for the second pole and third pole as the incoming zip lines? and on the 1st, 3rd and last poles at what degree? See attached files for more info that I have gathered and sketched up. I would like to learn as much as possible in this process. I am somewhat comfortable with math, but it has been a few years.