Learning Curve Edit
The Learning Curve Terence is VERY odd. There are Two Styles!
The first style, had wheels, with removable Caterpillar tracks! The New Style however, has unremovable Caterpiller tracks. (The same with Byron.)
The Ertl Terence is PERFECT! It has moving Caterpiller tracks. I'd say it about 100% of detail. The Ertl Terence has gray Caterpiller tracks, and I don't know why they put white ones on Thumper.