The Quiklok is great - solid and stable. Make sure the KB stand is also solid, or the wobble will increase with the extra extention of the boom and mic weight. You also may get noise transfered to the mic from stand rattle or kb banging .... depending on how hard to play.

I use two of those attachments .. one for the mic and the other for my laptop stand. I had a custom made bracket fitted for the laptop part. It uses standard USS tubing to attach. Works SOOOO great.