On the new one I took off the spring and small nut. It seems to cause people to many problems. Those that want it can add it if they want.
In the updates forum, version 2 thread we have been talking about new parts for a while. The parts will be available pretty soon but only for the brave souls who want to give it a test run. after we get some confirmations that it works, and it is actually better I will change the parts on thingiverse and update the instructions, and make new tool holders.