I recently posted about a solid pantographed (Viner) NR seatpost and
this weekend found someone with info. Seems the previous owner had a
friend who was a machinist and would modify parts for him on occasion.
The seatpost in question was a short one and he needed a longer post for
his tandem. It seems that what I thought was an insertion limit line is
the interface between the original post and the 2.5" addition that is
wedged into it. Mystery solved! Now I just have to figure how to get it
out without disfiguring the seatpost!
Len Diamond
Ridgewood, NJ