Fountaine Pajot - Custom Modifications-bow sprit, keel extension, holding tank

[Sonosailor]

I am considering three modifications to my FP Tobago 35, and would love to hear opinions from others, experienced or not, that might enlighten me regarding these:

1. A "bow sprit" that extends forward to allow deployment of larger headsails. I have heard that this is not uncommon, and that the Tobago could stand to have more sail forward.

2. Extension of the keels forward and aft, to allow improved upwind performance. My idea, after assessing performance. Mind you, I am more used to the upwind performance of a Hobie 21.

3. Holding tank for the toilet and the greywater. There are more and more areas, especially in North America, where they require the use of holding tanks. As yet, I cannot envision the best place and configuration for such an installation.

I would appreciate anything from a 2-bit opinion to an experienced evaluation, regarding a Tobago or similar boat.