Screen door latch

This is a replacement latch for a 1960's vintage screen door made by Arcadia. The company no longer sells spare parts for these doors, so current homeowners need to scavenge or fabricate new pieces for their doors.
I went through several versions of this part; the simplest, solid version prints fine on the Makerbot. When I tried uploading it to Shapeways for printing on their machines, I realized the solid construction raised the price and so created the final hollow version.
More details about tuning the model at:
http://makerbot216.blogspot.com/2010/09/differences-between-models-for-makerbot.html
Final picture shows latch printed by Shapeways on high-end printer, $5.88 vs 20 cents in material for the Makerbot-printed model.