Minature vice upgrade: moving block with tighter fit

This part is an upgrade to my popular miniature vice system, which can be used as stand-alone part (e.g. as third hand for soldering work) and with the also available table clamp.

Please note that this upgrade was intended for the first version of the miniature vice, which can be found here:
https://www.prusaprinters.org/prints/50151

If you have not printed the vice yet, I recommend to go for the new version right away, which features a reworked moving block anyway, which gives much more consistent print results. You can find it here: https://www.prusaprinters.org/prints/53471

Now this part is an optional upgrade, for those that want a tight fit of the moving block with a bit of friction, so that it does not move by itself when the main screw is not tightened. Frankly, I personally prefer parts that are rather slightly too loose, rather than facing the risk that I need to sand it down for a perfect fit. But I understand the request in the comments, so here it is, a moving block that still slides ok on the dove tail rail, but with a bit of friction.

Happy printing everyone! Enjoy the little vice for your hobby projects while you try to kill some time during the lock-down. Stay safe and take care for yourself and for others!