There is a weight difference of about 10% (5kg) between the boats, and as most of the regular sedans can carry about 100kg on the roof there is no problem car toping a cat around 50 kg all included.
As to the construction, I think it’s really up to what material you prefer wood or foam. As the cats are rather small there is no significant difference in building costs, the foam maybe a little bit more expensive. The time to build is about the same, also depending on previous experience with the materials. If you want to build a round bilged hull the foam is the solution, the tortured ply is asking a lot more hours of work for the same result, with the foam there is almost no filler and sanding and filler and sanding...
An other advantage with the foam is that you need very few and simple tools.
No test with kids yet if I dosen't count

Had to go out once more before painting. There was 15-20 knots of wind. This is a fast cat.

http://www.gust.ax/gallery/f12/08-09-25/

W00T!

Good to see the hulls had enough volume. Grown man on one hull!

Was it tempted to nose-dive?

She is not prone to diving. Did dig in once, but that was asking for it. The DS 12 is diving faster.
It's sad that I don't have a rig for them both for the moment, it would be easier to compare, still I have the feeling that your cat is a little bit faster at least when it comes to max speed.

Interesting! I wouldn't expect that because the developed linesplan was only aiming for a forgiving boat to drive, not necessarily a fast boat.

How long till you get a second rig and on the race course?

The cat is both safe and forgiving, but in winds of +15 knots i'ts deffenetly alive.
As for the two boats together I will try my best, but honestly we soon start to think about Ice-boat sailing here...
http://www.gust.ax/gallery/josh/07-03-12/

ncik,

does the design have a name yet? Have I missed it? Also do you have plans that can be issued to everyday builders or are they Gato specific at this stage?

No name yet. AN12, i12, Fuse, Sprint, BG12, Kitten...? Just some ideas.

The extent of the plans at the moment is basically a linesplan only. There is a 3d model of a half mould also, and some sketches of structure, but no construction plans. I would consider preparing plans if there was significant interest.

If somebody want to build one it can be done with the plans ncik already have and a little bit help from me

Decided to call the design the Tabby.