I have had my ultimate for 2 years now and love it with the YS-120 it has good power here in Denver even when altitude density is at 8,000 ft. most of us here in Denver use Magnum Fuel #2 and can run a 17 x 8 APC @ 9200 - 9400 RPM

2 friends have YS 140's on there's and they have unlimited virtical

One vitue of the ultimate is that it does not even care if there is a 25 mph crosswind it will groove right in and land easily.

Don B Miniature Turbine S & S