I've searched the forums for an answer to my question, but there doesn't seem to be any consensus. Basically, what are the current thoughts on anchoring a riser to floor? I think that the weight of the lumber, seats, and people should be sufficient to keep it from shifting but am a little concerned about some movement. We have ripped up the carpet to install the riser, so don't want any movement to adversely affect the carpet installation over time. Is there any drawback to anchoring the riser to the floor? Thank you!