Well today I finish making a case for the AP900. I found this chest at Lowes, Contico Deluxe Chest, 23.5 gallons and $30.
I put in a custom padded interior using good foam, some high density close cell and some medium density open cell foam. Most pieces are covered in a carpet like material and then glued to the case. The bottom has 3" foam, covered with the carpet cloth, so that it is very cushioned from road vibrations. The divider and the two un covered charcoal color foam pieces that hold the DEC are all removeable, making it much easier to remove and put them in the case. Just need to put the three removeable pieces in after positioning the two mount halves. It hold them quite nicely and securely with no movement. The lid has cloth covered foam parts that compress when it is closed and hold the two parts while still giving cushioning as well as control over the parts so they can not try to shift.
I just did not have the $500 for a custom case and this one weighs under 50 lbs loaded with the mount. I can easily lift it into the storage bin in the motor home.
[SIZE="Large"][/SIZE][COLOR="Blue"][/COLOR] Floyd Blue