No, your lag will be due to the unrefined engine code. Your 56k modems should be fine as long as they deliver an effective throughput of ~ 1k, which should be no problem even with the worst phone lines. The demand of CB might increase, but I doubt it\'ll increase by more than factor 10, so even an old 14.4k modem would still suffice. So I\'d expect you to be perfectly fine.