Six months after slashing taxes on gambling establishments, Spokane County commissioners might offer even more help. A $7,000 penalty accrued by Aces Casino when it failed to pay taxes on last year's third-quarter gaming receipts would be waived under a proposal that commissioners will consider at a meeting Tuesday. The casino blames its tardiness on cash flow problems it suffered while still paying the older, higher tax rate."I'd hate to see them disappear if there's something we can do to keep them," said Commissioner Mark Richard, who requested board consideration on the penalty. "I think we'd send a very clear message that it will be a one-time occurrence."