My new adjustable bed

Hi, I am a disabled person and my family recently purchased me a semi- electric, Invacare adjustable bed.The bed is a couple inches lower in the midddle because of the way it was poorly designed.This means the mattress is lower in the middle ,kind of like a hammock.I have no Idea why Invacare designed it that way.The bed rails are divided in half and are held together in the middle with a couple bolts. Because of this it does not have adequate support in the middle of the bed,so my family purchased a couple floor jacks to put under the bed on each side in the middle. Although this gives the bed the support that it lacked, it still bows down in the middle because of the poor design. Inavcare only makes two different kinds of mattresses,springs or foam rubber.The mattress I have is the springs and it is way to soft for me.We are now searching for an adjustable, extra firm,spring mattress.I am hoping that we can find one from another manufacturer that makes adjustable beds. The head and foot can be raised and lowered by a push of a button.I am very pleased at how quiet the motors are.I can barely hear them. The reason we didn't return the bed is because this was the only one my family could afford and I'm not on disability income yet and don't have medicaid yet either.I'm sure glad Invacare is making an affordable adjustable bed. Once I a get an extra firm mattress,I'm sure I will be very pleased. To be continued............