Soay
I currently use a 296 in a AA-5B Tiger and can recommend the dash-mount adapter which came with the GPS unit. It's much easier to position the unit in the center of the instrument panel and use the in-built swivel function to position the screen for best viewing.
The unit is quite heavy, so this approach avoids the problem of trying to balance the unit on the control column.
The only thing to be aware when operating via the dash-mount is the unit & mount can shake free during start-up and shut-down if using the tempory adhesive stickers (the a/c is group owned, so no permanent fixing of dash-mount). The solution, keep a hand on the unit during these times.
Other than that the 296 is a fantastic bit of kit, I'd not be without one.