Years ago, when the 'box' and aresti style pattern was introduced, a friend of mine had a Tipo built for him as a taildragger...
Unfortunately, the builder (who did a great job) just put in the mains in the conventional location - OOOOOPS. A nosegear was retrofitted and the plane flew great. The pilot did try (repeatedly) to get the plane off the ground as a tail dragger. Broke a lot of props before giving up :-)