My deepest apologies old boy. I simply detest attemping to communicate through these new-fangled miniature communication devices, useful though they may be for rapid responses to requests for assistance, so I do have a somewhat distressing habit of reducing the quality of my communications when I endeavour to use said devices.
I was advising that it's perfectly possible to run the bike without an exhaust canister, assuming, naturally, that you are retaining the original catalyser box, because the catalyser box will act quite efficiently as a silencer, reducing the volume of output to 'nearly' legal levels all by itself. The original equipment end canister merely provide extra sound-deadening to bring the overall volume down even more, whilst also helping to keep the bike looking 'normal'.
I would advise buying or making a short extension pipe that fits over the exit from the catalyser box however, as it will tidy up the look of the installation, whilst also providing some protection to the catalyser box from the ingress of precipitative moisture when the vehicle is parked in a stationary manner.