Ok you have the L184. I thought you had L1840, because the Laratub is for L1840. The L184 has the Latub 2500.
So, in that case the L184 manual shows the 100mm lens does need a recessed board. They indicate a Seipla, which is the recessed insert shown in post #783 above.
I can see the aperture ok with Laratub (first picture).
Do you use the Laratub on L184? I did not know it worked on the L184 as the L184 had the Hotub 2500 which is deeper (second picture).
Bookmarks