Rudder indicators

Do you have an existing A-pilot already installed. Most mfg's have a rudder angle already on their GUI or easily adaptable remote display available (ie Simrad).
The not-so-smart but reliable Raritan stuff is bomb proof and found on e-bay cheap.

Have you ever considered an A-pilot? In your future plans? You could satisfy two projects with one purchase.
If you just want a rudder indicator, Raritan Engineering makes a bomb proof little system. Expandable to two stations.
Raritan Engineering | Rudder Angle Indicator
Our Bert came with the Raritan system and an old A-pilot system. We took a lightning strike after we picked up this old Bertram and when the dust settled, the Raritan stuff was the only thing working. Near 10 years later, it continues to work untouched since we picked this ole Bert.

The big deal is running a (shielded) data cable from the rudder post/tiller arms area to your helm. Don't be cheap on the data wire quality.
While your there, run a second spare/future 6 conductor data cable and a coax. Years from now you may thank this idea.
12Vdc at the helm, depending of the style of display, some holes in your dash. Lil grey box under the dash and your installed.

Looks like a simple/cheap little setup. If you just need some rudder reference, this unit could do o k.

However, Is it just a gadget you want on your dash? Would a clock or digital depth sounder or depth repeater be of greater value?