[GTJIM (R.I.P.)]

(K)nobody (K)nows!

By chokes, I presume you mean venturis ?? see post #6

I have a nice NEW pair of 40mm OMs from a late model twin-spark Alfa and several used ones from 'alfa1750' on EBay ... but no OE's to compare!

Do have some 40mm Dell'Ortos though - must check to see if their venturii fit.

 

[GTJIM (R.I.P.)]

Yeah - 'chokes'

The 'chokes' are the venturii - that is why the 'auxiliary venturii' have that prefix ... they are 'auxiliary' (in addition) to the actual venturii.

I will try to check if Dell'Orto 'chokes' fit into OM's