Im Building a summer set up i have 21ft of a run in to work with. I think i'm gonna make the drop in 8ft high and the ramp 13ft long with a 2 ft tranny and 6 ft of flat to a 3ft tall jump. It will be 3ft wide. I don't know weather to use all turf or orange construction fence. Do these dimensions sound right to steep to tight of a tranny or what.