I got my cloudbound4 back in December of 2003 and am still putting it together. I was pretty much done with the major building in late May, but have been having issues since.

Here's tips I'll give (aka - where I messed up)

1) I thought each wing was in three pieces (a double polyhedral) - the wing being separated by two pages on the design is not meant to be a seperate polyhedral - they just ran out of paper!!!
2) The spar joiner between the polyhedral is "WAY" to short (1.5 in on each side). I landed just a little hard on one side and the two pieces of the wing split (my Aspire ARF handled rolling down the field on wingtips - when I was first learning to fly) - to get around this, throw out the little joiners and have the polyhedrals joined to the second rib on each side.
3) I'm having to take the covering off the back end now because I had to put a full pound (16oz) of weight in the nose to get it even close to the marked CG point (granted you need to fly it to get the CG correct), but without the nose weight , the CG was two-three inches behind the spar)
Some suggestions - 1) make sure to look at the tips for building the fuselage on Ray's website - I was doing the diagonal braces on the horizontal (like on the plans) - but Ray has pictures where he's just doing a few verticle pieces between the longerons. 2) I saw this neat trick in Quiet Flyer where they had a pull string and a spring on the rudder - really light weight as compared to pushrods/linkages. Maybe something like that could be rigged up

I set up mine with flaps and spoilers and dropped the drag brakes that are shown and just built the wing out at that point.

I didn't know much about building before this, but after all the mistakes I made, I sure did learn a lot.