I've searched for anything on your 24 foot ketch, but with no luck.
But looking closely at the photos I am sure you are correct that it is a home-built, or at least not a series boat. I say this because your boat (though lovely, and I would love to try her out) seems to have some rather straightforward areas of improvement. It's center of gravity seems off, for example.
On a side note, in looking at the photo of you under sail, you could actually get more power out of your sails if you were to move the anchorage point of your jib (I am referring to the larger blue mainsail) farther forward, a foot more (15 inches) would be great.
Remember, the headsails of a sailboat PULL the boat forward, and so when you have both up in a way that one disrupts the airflow over the other, you wil see a resulting loss of the necessary air needed to create the low pressure in front of them.
You see how the leading edges of your headsails are not parallell? This will mean that it will be impossible to generate an optimal airflow over the leading edge of them (because of their close proximity - it would not be an issue if the forwardmost sail were a goot 3 feet ahead). If you are unable to move the blue one forward, then you must anchor the bottom of the white one back a good foot.
Also, when there is little wind, you will want to not to tighten it so much. You need the extra curve of the sail to make an optimal shape to create the necessary low-pressure zone. If it is too tight (like in the photo) for the wind, you loose power, because the surface is irregular and cannot form a proper airfoil.
Also (sorry mate), in the photo you have your forempst headsail on the wrong side...the set-up in the photo is how you stop a sailboat. The larger, formost sail needs to be on the exterior of the other one.
Here, I made a photoshopped image that puts all of the above into something visual:
You will go much much faster keeping these in mind, in fact, your boat will take on a whole new level of performance