TOPEAK BEAM RACK V TYPE and MTX Trunkbag EX

This is the Topeak Beam Rack V type ( new packaged eBay £20 delivered ) , I have also purchased the Topeak MTX Trunkbag EX 8 litre ( £40 delivered Amazon ) , With Quick MTX Track , plenty big enough for my needs , puncture kit , showerproof shell , space for my camera , easy to remove . I want to be able to carry my Lumix FZ45 as it goes everywhere I go , and bits of kit for minor repairs without having to carry a rucksack