OK, I set out to write an alternative history of the Civil War book based on the following premises: That heavier than air manned kite flying was a thousand year old technology at the start of the Civil War. That it could also be stabilized for safer flight with off the shelf equipment that was available at the time was also well within the state of the art. Going further with a ramp launch was also obvious. Gun cotton was known and stabilization could be achieved with prize money in the $1,000 range. Bulk transport for the north went through three chokepoints that would require @83,600 specialty guns: coffee grinders and Gatling guns, to defend against low level air attack. But the south did not have such vulnerabilities and if the south gained gun cotton propellant and air power destroying enemy infrastructure would be relatively easy. I heard from friends that I should make a game and not finish the book. I am in the process of doing so. hopefully I will have a lawyer soon to handle the rough spots at a reasonable price. What tricks might I have missed?