108/080/109/156 balanced adjustable exhaust tee

[JerryPi]

There are lots of threads about 108/109 exhaust tees and purge covers. What I gathered was that the currently available exhaust tee is 01-043-108 for the 108 and 109 and apparently is not perfect for the 109/156.
What about exhaust tee 01-043-211? It's supposedly made for the BA (156). I can't find any reference for it anywhere else. Scouting through various pictures on the net, perhaps version a is -108 and version b is -211? However I don't even know if these are original SP parts.

Is this the case, can someone shed some light?
version a:

version b:


Thank you,
Jerry

 

[JerryPi]

I have acquired both tees. Here they are:

Top: 01-43-211 with a 35mm opening and a recessed quadrilateral, probably suitable for a later production 156/Balanced Adjustable?
Bottom: 01-43-108 with a 26mm opening suitable for a 108 and 109.

Can someone please confirm that the later 156/BA (I think the one with satin finish and a CE certification) has the larger modern exhaust valve and thus requires a tee with a larger opening?