>>What is the best way to start this process? Is there a guide to picking the right size floats? How do you scratch build?
I've also been seeing different post on putting the step under the C.G. and so on. <<

These are what we call "Frequently Asked Questions. Perhaps this link will help.

[link=http://www.smilesandwags.com/Floatsite/FAQ.html]Jim's float site[/link]

How do you scratch-build? If you built the kit, you got plans. Dust them off, pin them to a genuinely flat table, cover them with waxed paper, and cut sticks to be juuuust like on the drawing. Find somebody in your club and he will walk you thru it. It's not that hard. If you have no plans, lay the broken parts on a piece of butcher paper or posterboard on the table and trace around the shape that it's supposed to be. Use a ruler.

You may just be able to repair the sticks. Glue the fragments carefully back together, and glue another stick to the back of the patch.