I think if you side mount your Saito, you can complete hide the muffler by utilizing a 90 deg coupler. Have the 90 deg coupler turn the header rearward, and then connect the muffler to the header so it's like 45 deg in the front view.

I think with a 2-stroke, there is no nice way of hiding the muffler. Might as well get a pretty muffler like the Performance Specialist or Jett Stream muffler. You will need the power boost too. 61 FX stock is not a powerhouse by any mean. At over 11 lb and modest wing area., the take-off ride will be a while...