Simple Queue one followed by another RB

Hello, in a network I have a routerboard doing NAT with simple queue rules to control the bandwidth of the users. The system works fine. To some users of these I have to put another router doing nat again to be able to control the width of band of that internal network again with simple queues. The second routerboard does not control bandwidth well.
Can someone tell me if it is possible to do two simple queues in a row?
Thank you!!!