Wow you have one hec of a Tiger 1 there, ur eyes and skills to get the details correct are amazing me like.
Just one thing....those flaps are not flappers in constant use as they are check valves only in use during (Tauch) submerging.
Normaly they was pinned down in open position.
http://tiger1.info/EN/Dragon-mufflers.html
But they do look good in the You Tube clip.
![Very Happy :D](./images/smilies/icon_biggrin.gif)
Keep the saga comming the Tiger will be awesome.
Kind regards
Kent