#old revolrib8
pcylinder c1 3 5
pcone c2 2 1.5 3
pcylinder c3 1 2
ttranslate c2 0 0 5
ttranslate c3 0 0 8
bfuse ss c1 c2
bfuse s ss c3
nexplode s e
blend s s 0.3 s_4 0.3 s_2

vertex v1 0.5 0 11.
vertex v2 0.5 0 -1
edge e v1 v2
wire w e
ttranslate w -1.3 0 0
plane pl -0.8 0 11 0 1 0

featrf s w pl 0 0 0 0 0 1 0.2 0.2 0 1
featperform rf result

checkprops result -s 216.876