Could you allow input and output slots to the bin for top, sides and rear please? This is mostly for aesthetics (especially with a rear port) but might allow two separate networks of transporter pipes to share a bin block. Thanks!

I don't think so - I like the simple system of up = input, down = output. You should be able to share a bin by having multiple transporters link to the top, and using a restriction transporter on the different sides to prevent items from one side from going into the other.

This kind of storeroom would be a really good feature of Mekanism, but it is currently impossible to automate storage into these bins due to the only inputs being on the top. Either transported items should be able to pass through bins with other items on their way or there should be some way to get things in from the back.

Side note : I have SonicEther's Unbelievable Shaders on here, and the full brightness of the item renderering gives them a shine that makes them indistinguishable. Perhaps have an option in the config to make them render at the block's light value, rather than always fullbright?