More travel in the Y direction would be nice. I dunno though... for 300 bucks coupled with $150 for belt drive, another $50 for air lift and we're getting close to the price of an X3.
Yes, thats true. And I would love to have an X3. But I already have an X2, with a belt drive and an air spring, and there is no way I can afford an X3 right now.
As for the gas spring, I bought one from McMaster-Carr. I think it cost around $15.