they have an articulated thrarching lever here...
(
dirk speedrift Sit doon,
Thu 15 Nov 2012, 15:57,
archived)
Excellent!
I've already rimmed the satchel-arm. A bevelled spill-trunion, hmmm..., could come in very handy.
(
Puromycin is still licking windows,
Thu 15 Nov 2012, 16:10,
archived)