I posted this on the main forum, but got no response, so I will try here. This may be the more appropriate forum anyway.
This post-war accessory's static road sign appears to me to be a bit "boring". So, I got the idea to remove it and install a 154 highway signal. With both the operating figure and signals it might be an eye-catcher. With the static sign removed, there appears to be enough space to place it.
Anyone done this? Any thoughts on difficulty/unforeseen gotchas, etc.? To access the innards requires bending a few metal tabs. No screws are used.
Bill