There's as simple way to squeeze a few inches: you basically squeeze the diameter of the yurt which will raise the walls by a couple inches and the bagaans a few more. The rule of thumb is that what you loose in diameter, you add under the bagaans (central poles). We have done 6 inches, you can try 12 inches. 2 feet might be too much. It will be easy to adjust felts and inner liners, but the outer canvas might need a little more convincing. Otherwise you could install the yurt to the diameter you want. You will then have to cut the bottom of the walls so that the top of the lattice is slightly higher than the door, so that the huns (roof rafters) are the same height as the top of the door. You will then have to cut the bottom of the bagaans in order to get a similar roof pitch as before. and then cut the ends of the huns. Here again felts and inner liners will be easy to adjust, but the outer cover will certainly not fit perfectly and you will have to cut it above the door.