I have an original Chaser with the small 4" plastic wheels and it can be a bit tricky to land on some rough airstrips.
You also have to be careful to keep the nosewheel very straight on landing.
The Pursuit 10 with Edge wheels is great for cross country trips...I can land just about anywhere.
I had new forks made from CroMoly which are virtually the same as the original forks, but wider for the Edge wheel.
It makes the foot-room in the pod a bit more restrictive though, but acceptable.
Good luck with the sail changes
Cheers,
Damo