The quick answer is NO! The answer is also NO if you want to change the rig, or add a central rudder or lots of other modifications that you would like to see. Like all designers I spend a long time deciding on the initial concept of the boat and then even longer on working out all the details.

I know it's easy to add an extension to a house when you need more room for a growing family. But houses don't have to sail to windward, and it doesn't matter where the centre of gravity is - a house will always "float" level.

If you have a small car but would like it a "bit bigger" you don't go to your local garage and ask them to "add a bit in the middle". If you want more performance you don't just fit a bigger engine. You know that you would have to change the steering, brakes, chassis etc as well. So you either accept what you have or trade it in for a larger or faster one. So why, when it comes to boats do people think that they can have what they want, rather than what the designer drew?