Ognib, I haven't checked into this forum in a long time because of outside jobs. Having refreshed my memory of this model I have to ask,
with all due respect, have you completed a panel from the dozens of bucks you have made?
I generally check and do the panels as I go.
Also in that "away time" I produced some piece with methods that might be of help. If you will look through this post and consider
the front axle construct and the method of doing the headers.
http://largescalemodelers.com/forum/viewtopic.php?f=7&t=457
Again, this is only a "serving suggestion".