I have used one of the bath tub stools for several years, That are pretty solid and are adjustable for height if desired. I think mine was $30.00 at menards. Makes a light weight adjustable seat with a nice sized seating area. The drawback is 4 legs never sit flat and solid like 3 legs will. I made a little shelf for the side of mine even to set ammo blow tubes OBIs and odds and ends on beside me. These stools are fairly inexpensive and can sometimes be found at garage sales also.