I used "JACKS" Dressmakers pin direction for the Rivets on my Tiger 1s Fenders I also bought from a "Dolls House Accessories" web site the slide bolts that lock and unlock the side flaps of the fenders and to give the fenders a bit of stiffness I backed them with 1mm Plasticard,
It is all pretty easy but very rewarding.
Jack when I get a bit distracted from this mayhem I mix building 1/8 R/C Warbirds and drowning in books on all things Armour, It never fails although do watch out for runaway Focke Wulf 190s,
I now have a double scar on my lower leg where the propeller stopped,
Shaun.