Hi everyone, I don't know if I'm the only one with this problem but I've always had difficulties pushing the WCU4 trigger button. So I designed a more ergonomic push button that you can place on top of the original one. After the print is done, you need to tread the push rod to M3 metric and use a M3 x 8mm Hex bolt (I can make a UNC version for you american folks if needed). Files >> https://www.thingiverse.com/thing:5400224