If you fit the OE bracket George are you going to fit the OE packer/seal in the silencer to collector box? I can see the Thuruxton silencer you currently have fitted is straight, fitting the OE bracket may angle it slightly upwards opening up the joint between the silencer and the collector box and this will require a packer gasket otherwise the joint could end up blowing.
You can get the packer on eBay a lot cheaper than Honda OEM.