Which is used ESPRESSO transparent canned glue ,the glue without volatile ,invironment without the smell. leather not wrinkles 1:Which is used ESPRESSO transparent canned glue ,the glue without volatile ,invironment without the smell.2:Linear motion can walk ,can also take curvilinear motion .Maybe turning3:Speed can freely control the speed ,you want to fast or to slow4:Items can be set on the ...