By the time he converts it you'd be just as well getting the shakey with 3 from new, instead of invalidating warranty ect on the models with only 1 bladder.
Dave
Dave I have a Sparton, his bladders are far better than anyone elses
However i bough Daniel a Shakespeare expedition and it is excellant. Same design.
Not quite as Good material for the bladders (far better than Ron thomson, snowbee, and many others though) but i'm happy for the bairn to go out in it, and that must speak volumes
At least you can blow them up nice and hard and if one leaks you can get to shore. Plus they are inflated by Mouth, so you can keep inflating a leaking bladder to get back to shore, if you had too. I know what i regard as essential features,
Sandy