Doonks

Hi I'm new to this community, have a 2006 Viffer which I bought new and remains totally awesome! I live in Melbourne, Australia. I'm about to tour Tasmania and have the opportunity of purchasing some 2nd hand but never used Kappa Racks and Side Panniers. I currently have a Ventura Rack fitted, and use that for my large expandable RJays Textile bag. I need to know if the Kappa Racks can be successfully fitted to my bike along with the existing Ventura Rack still in place? Any advice or assistance would be gratefully received regards Doonks