Would it be possible to add a "Trade in" and "Trade out" access ?

Here is how it would work :
You insert the Cost in the "Trade in" hopper, and get the Result in the "Trade out" hopper

Cost [in hopper] > Vendor Block > Result [in hopper]

This would allow players to automate their trading commerce, it would work wonders with the create mod.

Hello man!
Just today, Tom updated the mod, so now you may automate input and output.
Just tune up required face with "shift" pressed.
Try it out!

P.S. Tom, THANK YOU ALOT for the great mod and implementing that features! You are the best!