# TAZ 4 Extruder Weight Reduction? **URL:** \ **Category:** Hardware\ **Created:** [November 21, 2014, 9:57am UTC](https://forum.lulzbot.com/t/taz-4-extruder-weight-reduction/1009 "2014-11-21T09:57:17Z")\ **Posts on this page:** 1\ **Showing post:** 6
**Author:** ![Brew4You](https://avatars.discourse-cdn.com/v4/letter/b/ebca7d/32.png) [@Brew4You](https://forum.lulzbot.com/u/Brew4You)\ **Post date:** [February 19, 2015, 5:56pm UTC](https://forum.lulzbot.com/t/taz-4-extruder-weight-reduction/1009/6 "2015-02-19T17:56:32Z")
> I thought the whole point of open source was to improve 3D printing, using the community to source innovation at an accelerated pace > > > > I find with the current weight I get speed wobbles unless I print quite slowly. The UM-TAZ difference for the most part here is not speed but acceleration. UM2 is set at 3000, I believe, and TAZ4 is at 500. I think this thread can tackle both of your comments. 😃 > [@linear bearing backlash, big X axis issues](https://forum.lulzbot.com/t/linear-bearing-backlash-big-x-axis-issues/966/1): > > Greetings, I’ve been printing with my TAZ 4 for a few months now, very happy by the quality and build volume. I came into serious issues with print quality very recently, let’s say in the past 2 weeks. I started to notice some oozing on the side of parts, usually when doing curved part. that was new to me, as I printed a lot of parts, including complex quadcopter parts, a full flexidually head (not finished yet, about to install the steppers on it) and more. Looking at the parts, I could see… I’m also thinking about a dually bowden rig. But given that Lulzbot has a fleet of production printers with direct extrusion the tradeoffs to go to a bowden must not be that great. --- _[View the full topic](https://forum.lulzbot.com/t/taz-4-extruder-weight-reduction/1009)._