The ones that might need to vary is #16, use 11 x 1.5 mm or 12 x 1.5 mm, for the rest you can use the chart.
36 sits in the bottom end of 38 and seals the chimney with 38
Thanks man! Ok, that makes sense with 36... i dont have my v4 with me right now so i was going by memory and couldnt remember cleaning that/taking that apart yesterday. Probably sitting up in there as i had perfect vacuum and no leaks.
Hell, maybe i'll split the difference and go with the dura 70 11.5x1.5mm rings. What seems to fit best in your Tobeco?