Your Saito will haul something of about 7.5 lbs as long as it has a decent foil, I mean I am sure it will easily haul a 8 lb Piper Cub etc. If its an acrobatic plane then what you have is the smoke system will be about 16-20 oz. Most 40 sized acrobatic planes have about only 4-4.5 square feet of wing area, hence you would have increased your wing loading by about 4-5 oz/square foot, that will not be nice on a small plane. So its not worth it, all the high wing loading just to look good with smoke? Will not look good when you have to pack your plane home in a garbage bag.