Nice idea with driftland. Simple yet lots of fun! I like the freedom of being able to choose what turns you want to link and how you want to do it all, lots of possibilities
The UF1 workout has remained pretty good. The only thing that needed changing was the second ramp leading onto the 'road of tyres', it was intersecting another ramp, causing a car2plane effect when you went over it and some other ramps needed moving back a bit.
I hope you don't mind that I did those changes. They were very minor anyway