I am looking at a few of the "old" IV-P fast build kits vs. purchasing a
"new" fast build IV-P kit from the factory with all of the latest
enhancements. Do any of you know what the meaningful enhancements were to
the kit since the late 1990s? I think 1999 was a major upgrade to the kit
(more complete wings, flaps, ailerons, FB door, etc.).  Dan Olsen

Dan, the one very valuable upgrade you didn’t list which I can think of is the SS brake lines in the main gear legs.

You can buy the kit from Lancair. There are pretty easy to install.

Craig Berland