Make sure you read the fine print on those checks. Some CC charge you a fee for using those. Not a big deal if you only use 1 check, but it would be an issue if you used many of them.
It's 3% or max $199 per check. The only thing I would need to do is tear up the CC after the check, since any new purchases would gain interest at the normal (higher) rate and none of the monthly payment would go towards the new purchases.