Dutch Barn Sport Court

I need a Dutch Barn-style sketchup file created in the 2017 Sketchup Make version, so that I can modify it after it is done. Here is a link to one that can be had for free, but it isn't supported by the 2017 version.

I need the anchor beams to be 14 feet, shoulder to shoulder, with only one bay and two bents; with the aisle beams to be roughly 7 feet, shoulder to shoulder, to be 30 feet wide, and 20 feet long; Rafters of 4.5"x6", the length from peak to rafter tail, with open mortises at 90 degrees for the 12/12 roof; Main (arcade) posts 8"x8" x 18' long, with wall posts 8x8x_____ to meet at the rafter tails.

https://3dwarehouse.sketchup.com/model/c30929f2-63e5-4a05-b804-9945618381af/Dutch-Barn?login=true

Thanks!