PDP-11/40 modified to be a PDP-11/23

[Glen Slick]

On Tue, Jun 21, 2016 at 6:05 PM, Michael Thompson
<michael.99.thompson at gmail.com> wrote:
> The RICM just picked up a PDP-11/40 chassis that was modified to accept a
> PDP-11/23 board set. It also contains a custom board to interface the
> PDP-11/23 to the original PDP-11/40 front panel. It is quite an
> accomplishment to get the Q-Bus board set working in the Unibus chassis.
>

What boards exactly? Are you sure it's not an M7133 11/24 board instead?