I chose to use a simple method that was easy to create and did not require any drilling or difficult to remove brackets on the Casita.
Materials (all from Lowe's):
2 - 1"x10"x8' clear pine (or similar) boards
6 - Screw on 12" table legs with mounting plates
Felt padding for leg bottoms (if vinyl floor)
Velcro strips - heavy duty (to keep board from slipping)
The 1x10's are actually 3/4" x 9 1/4" which is almost the perfect thickness to fit into the indent on the sides of the benches. The board width results in an overall bed width of about 31". This is less than a true twin bed but very adequate for most adults, and leaves a walking/feet gap between the beds of about 13". I think this is about perfect, but a wider board could be used on one or both sides if necessary.
Cut the boards to 81". The curb side bed is actually about 1/2" longer than the street side, but this length leaves enough gap at the end to miss the trim. Cut a curve in one corner to avoid sharp leg pains. I used one of the table top corners as a pattern.
Evenly space the leg brackets and screw them on. Be sure to keep in mind where the curved corner is going to end up, and which side is the top and which the bottom, and don't ask me why I think this is important! The front leg on the street side needs to miss the circuit breaker door, and the rear leg the pump access door (see note).
Place three 4" or so strips of velcro, evenly spaced, on both sides of the notch in the bench, but leave the top sticky cover on. Lay a board down and screw the center leg in all the way and judge how much of the leg you will need to cut off (put the felt pad, unattached, underneath it to account for it). Or place the leg at the edge of the board, get it level, and measure how much needs to be cut off. On mine, this was very little, maybe 1/8" - 1/4". Note you can always make a leg longer by leaving it partially unscrewed. Repeat process for other legs on side, remove velcro adhesive covers, and carefully set board in place. Sit on it to bond the velcro. Repeat leg installation process on other side.
That's it. Easily removable and light weight, but sturdy for sitting on.
Note: The rear street side leg positioning was blocked by the lame wiring cover Casita uses. So I modded that to make room and that mod is here: http://www.casitaclu...?showtopic=9921
Edited by Patrick M., 29 January 2008 - 02:33 PM.