Hey Deadlydad,
To fix the multiplayer problems I had to remake the whole input system. Hopefully the new Mouse/Keyboard set up is better for you. If not I can try to add some rotation sensitivity. On the next update I'm adding a precision button while placing that would stop snapping into place on just stick to the grid. In the new update pickups dont disappear unless they go off screen. The planks do go crazy sometimes I'll try to tone them down.
Thanks for the feedback and support, I really appreciate it. Please check out the new update I hope you like all the new changes.
Rafi