It looks good in the picture, however, I believe it is an empty plane. Put two people, gear and full fuel in and then look at it. I suspect the head caster angle will be off. The reason you feel the shimmy in the last half of the roll out is because the wings/tail are still supporting some of the weight. A simple re-arch should make it better. I run two different springs sets depending on the mission. I have had to re-arch both in a single year not uncommon for a hard working cub or a new pilot doing a lot of tail first landings. DENNY