It's Friday and my beer tastes of metal...

Just did these today. It's a SPT, a stem/handle bar stub that clamps to the post to allow a handle bar bag to be mounted behind and below the seat. First (to my knowledge) done by Eclipse back in the 1970s. Also part of the job is a support strut set to span between the rear eyelets and the bag's rack. Normally these bags have a lot of bounce being canti levered off the bar/stem. With the struts the back end (or ft end if over the ft wheel) will have a vertical support brace. The SPT needs finish filing, cutting down the post clamp, cutting the binder slot and reaming for the 31.6 post. The struts are only begun. Andy.