I haven't tried that particular brand but I didn't like using a hole saw for wheels when I tried it. Unfortunately I have not yet found anywhere in New Zealand that stocks ready made wheels. You can easily get them from E-bay but shipping is expensive at around $30. My plan is to try and find a supplier in China where most are likely made anyway but the minimum order quantity may be too high.
If you do find a supplier in NZ Merlin, or indeed any good suppliers of scrolling related stuff etc, I would be very interested in their details.
Thanks,
Rob