I'm building and S7 SS and would like feedback for those that have selected the 912IS. I live in the midwest (elevation 1600ft) and will be using this plane for all around activities. I do not have a need for high altitude operations in most cases but would like to fly to the mountains from time to time. Please let me know you thoughts regarding selection of this engine as well of prop setups that you feel are best choice. Thank you so much.