Yoder YS640 Competition Cart Tires

Hello all,
I recently received my new Yoder Smokers YS640 competition cart and I opted for the 8" pneumatic tires figuring it would move around easy enough. I was wrong!
I realize that this unit is over 400 pounds, I just expected it to move easier with the 8" pneumatic tires!
So I have 2 questions:
1) Does anyone out there have the YS640 with the optional 10" pneumatic tires and if so could you let me know how easy it moves for you.
2) If I decide to move up to the 10" pneumatic tires, do the mounting holes of the 10" pneumatic tires match up with those for the 8" pneumatic tires?
Thanks for your time!
Mike
I recently received my new Yoder Smokers YS640 competition cart and I opted for the 8" pneumatic tires figuring it would move around easy enough. I was wrong!

I realize that this unit is over 400 pounds, I just expected it to move easier with the 8" pneumatic tires!
So I have 2 questions:
1) Does anyone out there have the YS640 with the optional 10" pneumatic tires and if so could you let me know how easy it moves for you.
2) If I decide to move up to the 10" pneumatic tires, do the mounting holes of the 10" pneumatic tires match up with those for the 8" pneumatic tires?
Thanks for your time!
Mike