Cobra_03

I have a Proboat Shockwave 55ss and I junked the stock clutch and got a "Prather" billet aluminum clutch. The add says the clutch fits this boat........ [link]http://www.funrcboats.com/ProductInfo.aspx?productid=PRA9340[/link] So, I installed it on my Zenoah PUM260 and the collet touches the stuffing tube? I don't want to cut down my stuffing tube or modify my engine mounts to get it to fit. seems like there should be a collet of some type that would work. Any help would be appreciated guys.

Thank You!